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Turner MA, Cox KE, Liu S, Neel N, Amirfakhri S, Nishino H, Hosseini M, Alcantara JA, Abd El-Hafeez AA, Lwin TM, Mallya K, Pisegna JR, Singh SK, Ghosh P, Hoffman RM, Batra SK, Bouvet M. Specific Targeting and Labeling of Colonic Polyps in CPC-APC Mice with Mucin 5AC Fluorescent Antibodies: A Model for Detection of Early Colon Cancer. Curr Issues Mol Biol 2023; 45:3347-3358. [PMID: 37185743 PMCID: PMC10136452 DOI: 10.3390/cimb45040219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 05/17/2023] Open
Abstract
Poor visualization of polyps can limit colorectal cancer screening. Fluorescent antibodies to mucin5AC (MUC5AC), a glycoprotein upregulated in adenomas and colorectal cancer, could improve screening colonoscopy polyp detection rate. Adenomatous polyposis coli flox mice with a Cdx2-Cre transgene (CPC-APC) develop colonic polyps that contain both dysplastic and malignant tissue. Mice received MUC5AC-IR800 or IRdye800 as a control IV and were sacrificed after 48 h for near-infrared imaging of their colons. A polyp-to-background ratio (PBR) was calculated for each polyp by dividing the mean fluorescence intensity of the polyp by the mean fluorescence intensity of the background tissue. The mean 25 μg PBR was 1.70 (±0.56); the mean 50 μg PBR was 2.64 (±0.97); the mean 100 μg PBR was 3.32 (±1.33); and the mean 150 μg PBR was 3.38 (±0.87). The mean PBR of the dye-only control was 2.22 (±1.02), significantly less than the 150 μg arm (p-value 0.008). The present study demonstrates the ability of fluorescent anti-MUC5AC antibodies to specifically target and label colonic polyps containing high-grade dysplasia and intramucosal adenocarcinoma in CPC-APC mice. This technology can potentially improve the detection rate and decrease the miss rate of advanced colonic neoplasia and early cancer at colonoscopy.
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Affiliation(s)
- Michael A. Turner
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
| | - Kristin E. Cox
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
| | - Shanglei Liu
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
| | - Nicholas Neel
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
| | - Siamak Amirfakhri
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
| | - Hiroto Nishino
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
| | - Mojgan Hosseini
- Department of Pathology, University of California San Diego, La Jolla, CA 92037, USA
| | - Joshua A. Alcantara
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Amer Ali Abd El-Hafeez
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Thinzar M. Lwin
- Department of Surgical Oncology, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Kavita Mallya
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Joseph R. Pisegna
- Department of Gastroenterology, VA Los Angeles Healthcare System, Los Angeles, CA 90073, USA
| | - Satish K. Singh
- Medical Service, Section of Gastroenterology, VA Boston Healthcare System, Boston, MA 02130, USA
- Department of Medicine, Section of Gastroenterology, Boston University School of Medicine, Boston, MA 02118, USA
| | - Pradipta Ghosh
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92037, USA
- Department of Medicine, University of California San Diego, La Jolla, CA 92037, USA
| | - Robert M. Hoffman
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
- AntiCancer, Inc., San Diego, CA 92111, USA
| | - Surinder K. Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Michael Bouvet
- Division of Surgical Oncology, Department of Surgery, University of California San Diego, La Jolla, CA 92037, USA
- Department of Surgery, VA San Diego Healthcare System, La Jolla, CA 92161, USA
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Mejza M, Małecka-Wojciesko E. Diagnosis and Management of Barrett's Esophagus. J Clin Med 2023; 12:jcm12062141. [PMID: 36983142 PMCID: PMC10057256 DOI: 10.3390/jcm12062141] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/07/2023] [Accepted: 03/07/2023] [Indexed: 03/30/2023] Open
Abstract
Barrett's esophagus is a metaplastic change of esophageal mucosa, which can be characterized by its salmon-colored lining and the presence of columnar epithelium with goblet cells. It is a well-established precancerous state of esophageal adenocarcinoma, a tumor with very poor survival rates, which incidence is rapidly growing. Despite numerous research, the debate about its diagnosis and management is still ongoing. This article aims to provide an overview of the current recommendations and new discoveries regarding the subject.
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Affiliation(s)
- Maja Mejza
- Department of Digestive Tract Diseases, Medical University, 90-153 Lodz, Poland
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Alvarado-Julio A, Chumacero-Palma K, Buenahora MR, Parra-Izquierdo V, Monsalve M, Torres AM, Chila-Moreno L, Flórez-Sarmiento C, Ramos-Casallas A, De Avila J, Bello-Gualtero JM, Jaimes D, Beltrán-Ostos A, Chalem-Choueka P, Pacheco-Tena C, Bautista-Molano W, Romero-Sánchez C. Oral manifestations associated with inflammatory bowel disease and early endoscopic findings in patients with spondyloarthritis. BMC Oral Health 2022; 22:477. [PMID: 36348398 PMCID: PMC9644594 DOI: 10.1186/s12903-022-02497-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 09/06/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND AND AIMS Spondyloarthritis (SpA) is a group of autoinflammatory disorders, of which the primary extra-articular manifestation is inflammatory bowel disease (IBD). The oral cavity being a part of gastrointestinal tract, is significantly compromised in IBD, and in many cases, it is the first site of clinical manifestations of IBD. This study aimed to identify changes in the oral mucosa associated with the onset of IBD and their association with endoscopic/histological findings. MATERIALS AND METHODS The study assessed 80 patients with SpA and 52 healthy controls. Oral, rheumatological, and gastroenterological assessments were performed. The ileocolonoscopy was performed via digital magnification chromoendoscopy. The statistical analysis consisted of Chi-square, Fisher's exact, and multiple correspondence discriminant analysis tests. RESULTS From the disease cohort, 63.0% patients showed oral lesions (p = 0.050). These manifestations ranged from gingivitis (55.0%, p = 0.001), aphthous stomatitis (3.8%, p = 0.091), angular cheilitis (2.6%, p = 0.200), and perioral erythema with scaling (1.3%, p = 0.300). All patients who presented with alterations in colonic mucosa also had oral lesions associated with IBD (p = 0.039), specifically gingivitis/aphthous stomatitis (p = 0.029). CONCLUSION The patients with SpA without IBD present significant oral signs and symptoms. Gingivitis seems to be the most relevant because of its associations with early endoscopic and histological findings. CLINICAL RELEVANCE An integral approach to the diagnostic tests that includes evaluations of oral, rheumatological and gastroenterological tissues may favor timely attention and improve patients' quality of life.
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Affiliation(s)
- Andrés Alvarado-Julio
- Oral Pathology and Diagnostic Media, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Katherin Chumacero-Palma
- Oral Pathology and Diagnostic Media, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - María Rosa Buenahora
- Oral Pathology and Diagnostic Media, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
- Clinical Epidemiology Unit/UNIECLO, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Viviana Parra-Izquierdo
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
- Gastroadvanced SAS IPS, Carrera 23 #45C-31, Bogotá, Colombia
| | - Mónica Monsalve
- Oral Pathology and Diagnostic Media, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Ana María Torres
- Oral Pathology and Diagnostic Media, School of Dentistry, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Lorena Chila-Moreno
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
- School of Medicine, Clinical Immunology Group, Universidad Militar Nueva Granada/Hospital Militar Central, Transversal 3ª #49-00, Bogotá, Colombia
| | - Cristian Flórez-Sarmiento
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
- Gastroadvanced SAS IPS, Carrera 23 #45C-31, Bogotá, Colombia
| | - Alejandro Ramos-Casallas
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Juliette De Avila
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | - Juan Manuel Bello-Gualtero
- Rheumatology and Immunology Department/Clinical Immunology Group, Hospital Militar Central, Transversal 3ª #49-00, Bogotá, Colombia
- School of Medicine, Clinical Immunology Group, Universidad Militar Nueva Granada/Hospital Militar Central, Transversal 3ª #49-00, Bogotá, Colombia
| | - Diego Jaimes
- Clínicos IPS, Carrera 15 #98-29, Bogotá, Colombia
| | - Adriana Beltrán-Ostos
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
| | | | - César Pacheco-Tena
- Investigación Y Biomedicina De Chihuahua S.C., Calle 16 #1600, Chihuahua, CHIH, México
| | - Wilson Bautista-Molano
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia
- School of Medicine, Clinical Immunology Group, Universidad Militar Nueva Granada/Hospital Militar Central, Transversal 3ª #49-00, Bogotá, Colombia
| | - Consuelo Romero-Sánchez
- School of Dentistry, Cellular and Molecular Immunology Group/INMUBO, Universidad El Bosque, Av. Carrera 9 #131A-02, Bogotá, Colombia.
- School of Medicine, Clinical Immunology Group, Universidad Militar Nueva Granada/Hospital Militar Central, Transversal 3ª #49-00, Bogotá, Colombia.
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Bužga M, Machytka E, Dvořáčková E, Švagera Z, Stejskal D, Máca J, Král J. Methylene blue: a controversial diagnostic acid and medication? Toxicol Res (Camb) 2022; 11:711-717. [PMID: 36337249 PMCID: PMC9618115 DOI: 10.1093/toxres/tfac050] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/30/2022] [Accepted: 07/03/2022] [Indexed: 09/01/2023] Open
Abstract
A narrative review of the literature was conducted to determine if the administration of methylene blue (MB) in humans has potential risks. Studies were identified from MEDLINE, Web of Science, Scopus, and Cochrane. MB is a diagnostic substance used during some diagnostic procedures and also a part of the treatment of several diseases including methemoglobinemia, vasoplegic syndrome, fosfamide-induced encephalopathy, and cyanide intoxication, and the detection of leaks or position of parathyroid corpuscles during surgery. Although the use of MB is historically justified, and it ought to be safe, because it originated as a diagnostic material, the basic toxicological characteristics of this substance are unknown. Despite reports of severe adverse effects of MB, which could significantly exceed any possible benefits evaluated for the given indication. Therefore, the clinical use of MB currently represents a controversial problem given the heterogeneity of available data and the lack of preclinical data. This is in conflict with standards of safe use of such substances in human medicinal practice. The toxic effects of the application of MB are dose-dependent and include serious symptoms such as hemolysis, methemoglobinemia, nausea and vomitus, chest pain, dyspnoea, and hypertension. Some countries regard MB as harmful because of the resulting skin irritation and triggering of an adverse inflammatory response. MB induced serotoninergic toxicity clinically manifests as neuromuscular hyperactivity. This review aims to summarize the current understanding concerning the indications for MB administration and define the potential adverse effects of MB.
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Affiliation(s)
- Marek Bužga
- Institute of Laboratory Medicine, University Hospital Ostrava, Ostrava 17. listopadu 1790, OStrava, 70800, Czech Republic
- Department of Physiology and Pathophysiology, Faculty of Medicine, University of Ostrava, Ostrava Syllabova 19, Ostrava Vitkovice, 70030, Czech Republic
| | - Evžen Machytka
- Institute for Clinical and Experimental Medicine, Hepatogastroenterology Department, Prague Videňska 1958/9, Praha, 14021, Czech Republic
| | - Eliška Dvořáčková
- Institute of Pharmacology, 1st Faculty of Medicine, Charles University, Prague Albertov 4, Praha, 12108, Czech Republic
| | - Zdeněk Švagera
- Institute of Laboratory Medicine, University Hospital Ostrava, Ostrava 17. listopadu 1790, OStrava, 70800, Czech Republic
| | - David Stejskal
- Institute of Laboratory Medicine, University Hospital Ostrava, Ostrava 17. listopadu 1790, OStrava, 70800, Czech Republic
| | - Jan Máca
- Department of Physiology and Pathophysiology, Faculty of Medicine, University of Ostrava, Ostrava Syllabova 19, Ostrava Vitkovice, 70030, Czech Republic
| | - Jan Král
- Institute for Clinical and Experimental Medicine, Hepatogastroenterology Department, Prague Videňska 1958/9, Praha, 14021, Czech Republic
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Schindler A, Baijens LWJ, Geneid A, Pizzorni N. Phoniatricians and otorhinolaryngologists approaching oropharyngeal dysphagia: an update on FEES. Eur Arch Otorhinolaryngol 2022; 279:2727-2742. [PMID: 34779927 PMCID: PMC8591442 DOI: 10.1007/s00405-021-07161-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 10/26/2021] [Indexed: 12/16/2022]
Abstract
PURPOSE Oropharyngeal dysphagia (OD) is a common phenomenon in otorhinolaryngology and phoniatrics. As both sub-disciplines have a strong tradition and clinical experience in endoscopic assessment of the upper aerodigestive tract, the implementation of fiberoptic endoscopic evaluation of swallowing (FEES) was an almost self-evident evolution. This review aims to provide an update on FEES and the role of phoniatricians and otorhinolaryngologists using FEES in Europe. METHODS A narrative review of the literature was performed by experts in the field of FEES both in the clinical context and in the field of scientific research. RESULTS FEES is the first-choice OD assessment technique for both phoniatricians and otorhinolaryngologists. FEES is becoming increasingly popular because of its usefulness, safety, low costs, wide applicability, and feasibility in different clinical settings. FEES can be performed by health professionals of varying disciplines, once adequate knowledge and skills are acquired. FEES aims to determine OD nature and severity and can provide diagnostic information regarding the underlying etiology. The direct effect of therapeutic interventions can be evaluated using FEES, contributing to design the OD management plan. Standardization of FEES protocols and metrics is still lacking. Technological innovation regarding image resolution, frame rate frequency, endoscopic light source specifications, and endoscopic rotation range has contributed to an increased diagnostic accuracy. CONCLUSION The rising number of phoniatricians and otorhinolaryngologists performing FEES contributes to the early detection and treatment of OD in an aging European population. Nevertheless, a multidisciplinary approach together with other disciplines is crucial for the success of OD management.
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Affiliation(s)
- Antonio Schindler
- Department of Biomedical and Clinical Sciences "L. Sacco", Milan University, UOS Foniatria, ASST Fatebenefratelli-Sacco, Ospedale Sacco, Via GB Grassi 74, 20154, Milano, Italy.
| | - Laura W J Baijens
- Department of Otorhinolaryngology, Head and Neck Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
- School for Oncology and Developmental Biology-GROW, Maastricht University, Maastricht, The Netherlands
| | - Ahmed Geneid
- Department of Otorhinolaryngology and Phoniatrics-Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Nicole Pizzorni
- Department of Biomedical and Clinical Sciences "L. Sacco", Milan University, UOS Foniatria, ASST Fatebenefratelli-Sacco, Ospedale Sacco, Via GB Grassi 74, 20154, Milano, Italy
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6
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Pre-Cancerous Stomach Lesion Detections with Multispectral-Augmented Endoscopic Prototype. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10030795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this paper, we are interested in the in vivo detection of pre-cancerous stomach lesions. Pre-cancerous lesions are unfortunately rarely explored in research papers as most of them are focused on cancer detection or conducted ex-vivo. For this purpose, a novel prototype is introduced. It consists of a standard endoscope with multispectral cameras, an optical setup, a fiberscope, and an external light source. Reflectance spectra are acquired in vivo on 16 patients with a healthy stomach, chronic gastritis, or intestinal metaplasia. A specific pipeline has been designed for the classification of spectra between healthy mucosa and different pathologies. The pipeline includes a wavelength clustering algorithm, spectral features computation, and the training of a classifier in a “leave one patient out” manner. Good classification results, around 80%, have been obtained, and two attractive wavelength ranges were found in the red and near-infrared ranges: [745, 755 nm] and [780, 840 nm]. The new prototype and the associated results give good arguments in favor of future common use in operating rooms, during upper gastrointestinal exploration of the stomach for the detection of stomach diseases.
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Yeung DCM, Vlantis AC, Wong EWY, Tong MCF, Chan JYK. A meta-analysis of narrow-band imaging for the diagnosis of primary nasopharyngeal carcinoma. F1000Res 2018; 7:759. [PMID: 30026934 PMCID: PMC6039959 DOI: 10.12688/f1000research.15183.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/12/2018] [Indexed: 01/03/2023] Open
Abstract
Background: Narrow band imaging (NBI), an endoscopic technique featuring an augmented definition of microvasculature and mucosal patterns. NBI is increasingly advocated as a tool to characterize neoplasia and intestinal metaplasia in endoscopic standards, such as for colorectal polyps and tumors. Recently NBI has also been studied in the detection of Nasopharyngeal Carcinoma (NPC). Here we aimed to assess the diagnostic utility of NBI for the diagnosis of NPC. Methods: A meta-analysis of studies comparing narrow-band imaging and white light endoscopy in the diagnosis of primary nasopharyngeal carcinoma was performed. The review process involved two independent investigators. The databases used were MEDLINE, PubMed, the Cochrane library, Embase, and the Web of Science. Statistical analysis was performed with OpenMetaAnalyst, MetaDiSc version 1.4, and Medcalc version 17.9.7. Results: Five studies including 2480 patients were included. The sensitivity and specificity for narrow-band imaging were 0.90 (0.73-0.97) and 0.95 (0.81-0.99) respectively. The positive likelihood ratio and negative likelihood ratio were 18.82 (0.31-82.1) and 0.08 (0.02-0.31). For white light endoscopy, the sensitivity and specificity were 0.77 (0.58-0.89) and 0.91 (0.79-0.96). The positive likelihood ratio was 7.61 (3.61-16.04), and the negative likelihood ratio was 0.21 (0.11-0.39). The odds ratio for detection rates between narrow-band imaging and white light endoscopy was 4.29 (0.56-33.03, p = 0.16). Area under the curve for narrow-band imaging was 0.98 (SE: 0.02), and for white light it was 0.93 (SE: 0.03). There was no significant difference in the receiver operating characteristic curves between the two modalities (p = 0.14). Conclusion: Narrow-band imaging showed a higher sensitivity and positive likelihood ratio for the diagnosis of nasopharyngeal carcinoma. However, there was no significant difference in detection rates compared to white light endoscopy. Further investigation with a uniform diagnostic criteria and terminology is needed for narrow-band imaging in the diagnosis of nasopharyngeal carcinoma.
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Affiliation(s)
- David CM Yeung
- Department of Otorhinolaryngology, Head & Neck Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, New Territories , Hong Kong
| | - Alexander C Vlantis
- Department of Otorhinolaryngology, Head & Neck Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, New Territories , Hong Kong
| | - Eddy WY Wong
- Department of Otorhinolaryngology, Head & Neck Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, New Territories , Hong Kong
| | - Michael CF Tong
- Department of Otorhinolaryngology, Head & Neck Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, New Territories , Hong Kong
| | - Jason YK Chan
- Department of Otorhinolaryngology, Head & Neck Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, New Territories , Hong Kong
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Di Stefano AFD, Radicioni MM, Vaccani A, Fransioli A, Longo L, Moro L, Repici A. Methylene blue MMX® tablets for chromoendoscopy. Bioavailability, colon staining and safety in healthy volunteers undergoing a full colonoscopy. Contemp Clin Trials 2018; 71:96-102. [PMID: 29864547 DOI: 10.1016/j.cct.2018.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/22/2018] [Accepted: 06/01/2018] [Indexed: 11/30/2022]
Abstract
Methylene blue-MMX® tablets are proposed as an aid for detection and visualisation of adenomas and carcinomas in patients undergoing colonoscopy, by improving their detection rate and highlighting the presence of the intestinal dysplastic lesions. Single total doses of 100 and 200 mg were administered to healthy volunteers undergoing a bowel cleansing preparation and a full colonoscopy to investigate the colonic staining. The pharmacokinetics of methylene blue and the safety after exposure to the tablets were also investigated. With 200 mg, the best staining, assessed as the sum of acceptable and good staining, was achieved in the ascending colon and rectosigmoid (75% subjects each), the transverse and the descending colon (approximately 63% each). Absence of staining or overstaining were reported for no colonic region of interest in any subject. Similar results were observed in the 100 mg dose group. Methylene blue blood concentrations reached a peak (Cmax) in a median time (Tmax) of 12 h with 100 mg and 16 h with 200 mg. AUC0-t was 10.7 ± 6.7 μg/mLxh after 100 mg and 25.2 ± 7.4 μg/mLxh after 200 mg. Half-life ranged between 9 and 22 h after the lower dose and between 6 and 26 h after the higher dose. The cumulative urinary excretion was about 28% after 100 mg and about 39% after 200 mg up to 60 h post-dose. The overall frequency of adverse events after single dose of the test product administered along with a bowel cleansing preparation was 39%, but only one was related to the test product: abnormal transaminases. The most frequent adverse event was a transient polyuria (17%). One serious adverse event (gastrointestinal haemorrhage) led the subject to study discontinuation and hospitalisation and another subject withdrew the study due to one adverse event (haematemesis). Either event was not related to methylene blue.
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Affiliation(s)
- A F D Di Stefano
- Cross Research S.A., Via F. A. Giorgioli, 14, Arzo CH-6864, Switzerland.
| | - M M Radicioni
- Cross Research S.A., Via F. A. Giorgioli, 14, Arzo CH-6864, Switzerland
| | - A Vaccani
- Cross Research S.A., Via F. A. Giorgioli, 14, Arzo CH-6864, Switzerland
| | - A Fransioli
- Department of Gastreonterology, Regional Hospital, Bellinzona, Switzerland
| | - L Longo
- Cosmo Technologies Ltd., Riverside II, Sir John Rogerson's Quay, Dublin 2, Ireland
| | - L Moro
- Cosmo Technologies Ltd., Riverside II, Sir John Rogerson's Quay, Dublin 2, Ireland
| | - A Repici
- Department of Gastreonterology, IRCCS Istituto Clinico Humanitas, Milan, Italy
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Flemming J, Cameron S. Small bowel capsule endoscopy: Indications, results, and clinical benefit in a University environment. Medicine (Baltimore) 2018; 97:e0148. [PMID: 29620627 PMCID: PMC5902276 DOI: 10.1097/md.0000000000010148] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Capsule endoscopy (CE) opened a new method for visualization of the small intestine. We here further explore its clinical implications.We retrospectively analyzed the clinical benefit of CE in view of medical history, diagnostics, and therapy. Our patient collective consisted of 203 patients. CE was investigated in the context of bleeding, anemia, abdominal pain, diarrhea, Crohn's disease, and suspected tumors.The study collective consisted of 118 male and 85 female patients with a mean age of 58 years (range 8-90 years). Complete bowel transit took place in 82% of the patients. The diagnostic yield in the detection of obscure gastrointestinal bleeding was 80% and for anemia 78%. Mucosal lesions were the most common finding (43%). Unclear abdominal pain had the lowest diagnostic yield (41%). Ensuing therapeutic interventions were mostly medical (66%), and to a minor extent surgical (4.4%) as well as endoscopic (4%).In conclusion, small intestinal CE is a secure method to clarify small intestinal diseases, especially obscure gastrointestinal bleeding, even in pre-operated patients without stenosis symptoms. Our study emphasizes in a collective of patients with extensive prior diagnostics that due to CE therapeutic measures resulted in 73%.
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Affiliation(s)
- Juliane Flemming
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medicine Göttingen, Göttingen
- St. Joseph Hospital, Berlin Tempelhof, Berlin, Germany
| | - Silke Cameron
- Clinic for Gastroenterology and Gastrointestinal Oncology, University Medicine Göttingen, Göttingen
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Abstract
Cancers at an early stage of disease with a low risk of lymph node metastases or distant spread can be managed endoscopically. Different endoscopic techniques can be applied in the gastrointestinal tract. Furthermore, endoscopic and laparoscopic surgery can be combined in specific indications today. Most of all, resection-related complications can also be solved endoscopically.
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Affiliation(s)
- Arthur Hoffman
- Department of Internal Medicine and Gastroenterology, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
| | - Maximilian von Heesen
- Department of General and Visceral Surgery, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
| | - Otto Kollmar
- Department of General and Visceral Surgery, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
| | - Ralf Kiesslich
- Department of Internal Medicine and Gastroenterology, HELIOS Dr. Horst Schmidt Kliniken, Wiesbaden, Germany
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11
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Amadi C, Gatenby P. Barrett’s oesophagus: Current controversies. World J Gastroenterol 2017; 23:5051-5067. [PMID: 28811703 PMCID: PMC5537175 DOI: 10.3748/wjg.v23.i28.5051] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/03/2017] [Accepted: 07/04/2017] [Indexed: 02/06/2023] Open
Abstract
Oesophageal adenocarcinoma is rapidly increasing in Western countries. This tumour frequently presents late in its course with metastatic disease and has a very poor prognosis. Barrett’s oesophagus is an acquired condition whereby the native squamous mucosa of the lower oesophagus is replaced by columnar epithelium following prolonged gastro-oesophageal reflux and is the recognised precursor lesion for oesophageal adenocarcinoma. There are multiple national and society guidelines regarding screening, surveillance and management of Barrett’s oesophagus, however all are limited regarding a clear evidence base for a well-demonstrated benefit and cost-effectiveness of surveillance, and robust risk stratification for patients to best use resources. Currently the accepted risk factors upon which surveillance intervals and interventions are based are Barrett’s segment length and histological interpretation of the systematic biopsies. Further patient risk factors including other demographic features, smoking, gender, obesity, ethnicity, patient age, biomarkers and endoscopic adjuncts remain under consideration and are discussed in full. Recent evidence has been published to support earlier endoscopic intervention by means of ablation of the metaplastic Barrett’s segment when the earliest signs of dysplasia are detected. Further work should concentrate on establishing better risk stratification and primary and secondary preventative strategies to reduce the risk of adenocarcinoma of the oesophagus.
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12
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Vázquez D, Bernal J, Sánchez FJ, Fernández-Esparrach G, López AM, Romero A, Drozdzal M, Courville A. A Benchmark for Endoluminal Scene Segmentation of Colonoscopy Images. JOURNAL OF HEALTHCARE ENGINEERING 2017; 2017:4037190. [PMID: 29065595 PMCID: PMC5549472 DOI: 10.1155/2017/4037190] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/22/2017] [Indexed: 01/08/2023]
Abstract
Colorectal cancer (CRC) is the third cause of cancer death worldwide. Currently, the standard approach to reduce CRC-related mortality is to perform regular screening in search for polyps and colonoscopy is the screening tool of choice. The main limitations of this screening procedure are polyp miss rate and the inability to perform visual assessment of polyp malignancy. These drawbacks can be reduced by designing decision support systems (DSS) aiming to help clinicians in the different stages of the procedure by providing endoluminal scene segmentation. Thus, in this paper, we introduce an extended benchmark of colonoscopy image segmentation, with the hope of establishing a new strong benchmark for colonoscopy image analysis research. The proposed dataset consists of 4 relevant classes to inspect the endoluminal scene, targeting different clinical needs. Together with the dataset and taking advantage of advances in semantic segmentation literature, we provide new baselines by training standard fully convolutional networks (FCNs). We perform a comparative study to show that FCNs significantly outperform, without any further postprocessing, prior results in endoluminal scene segmentation, especially with respect to polyp segmentation and localization.
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Affiliation(s)
- David Vázquez
- Computer Vision Center, Computer Science Department, Universitat Autonoma de Barcelona, Barcelona, Spain
- Montreal Institute for Learning Algorithms, Université de Montréal, Montreal, QC, Canada
| | - Jorge Bernal
- Computer Vision Center, Computer Science Department, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - F. Javier Sánchez
- Computer Vision Center, Computer Science Department, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Gloria Fernández-Esparrach
- Endoscopy Unit, Gastroenterology Service, CIBERHED, IDIBAPS, Hospital Clinic, Universidad de Barcelona, Barcelona, Spain
| | - Antonio M. López
- Computer Vision Center, Computer Science Department, Universitat Autonoma de Barcelona, Barcelona, Spain
- Montreal Institute for Learning Algorithms, Université de Montréal, Montreal, QC, Canada
| | - Adriana Romero
- Montreal Institute for Learning Algorithms, Université de Montréal, Montreal, QC, Canada
| | - Michal Drozdzal
- École Polytechnique de Montréal, Montréal, QC, Canada
- Imagia Inc., Montréal, QC, Canada
| | - Aaron Courville
- Montreal Institute for Learning Algorithms, Université de Montréal, Montreal, QC, Canada
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13
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Hoffman A, Manner H, Rey JW, Kiesslich R. A guide to multimodal endoscopy imaging for gastrointestinal malignancy - an early indicator. Nat Rev Gastroenterol Hepatol 2017; 14:421-434. [PMID: 28611477 DOI: 10.1038/nrgastro.2017.46] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Multimodality imaging is an essential aspect of endoscopic surveillance for the detection of neoplastic lesions, such as dysplasia or intramucosal cancer, because it improves the efficacy of endoscopic surveillance and therapeutic procedures in the gastrointestinal tract. This approach reveals mucosal abnormalities that cannot be detected by standard endoscopy. Currently, these imaging techniques are divided into those for primary detection and those for targeted imaging and characterization, the latter being used to visualize areas of interest in detail and permit histological evaluation. This Review outlines the use of virtual chromoendoscopy, narrow-band imaging, autofluorescence imaging, optical coherence tomography, confocal endomicroscopy and volumetric laser endomicroscopy as new imaging techniques for diagnostic investigation of the gastrointestinal tract. Insights into use of multimodal endoscopic imaging for early disease detection, in particular for pre-malignant lesions, in the oesophagus, stomach and colon are described.
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Affiliation(s)
- Arthur Hoffman
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Henrik Manner
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Johannes W Rey
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
| | - Ralf Kiesslich
- Department of Internal Medicine II, HSK Hospital, Teaching Hospital of the University Medicine of Mainz, Ludwig-Erhard-Strasse 100, 65199 Wiesbaden, Germany
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14
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Bernal J, Tajkbaksh N, Sanchez FJ, Matuszewski BJ, Angermann Q, Romain O, Rustad B, Balasingham I, Pogorelov K, Debard Q, Maier-Hein L, Speidel S, Stoyanov D, Brandao P, Cordova H, Sanchez-Montes C, Gurudu SR, Fernandez-Esparrach G, Dray X, Histace A. Comparative Validation of Polyp Detection Methods in Video Colonoscopy: Results From the MICCAI 2015 Endoscopic Vision Challenge. IEEE TRANSACTIONS ON MEDICAL IMAGING 2017; 36:1231-1249. [PMID: 28182555 DOI: 10.1109/tmi.2017.2664042] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Colonoscopy is the gold standard for colon cancer screening though some polyps are still missed, thus preventing early disease detection and treatment. Several computational systems have been proposed to assist polyp detection during colonoscopy but so far without consistent evaluation. The lack of publicly available annotated databases has made it difficult to compare methods and to assess if they achieve performance levels acceptable for clinical use. The Automatic Polyp Detection sub-challenge, conducted as part of the Endoscopic Vision Challenge (http://endovis.grand-challenge.org) at the international conference on Medical Image Computing and Computer Assisted Intervention (MICCAI) in 2015, was an effort to address this need. In this paper, we report the results of this comparative evaluation of polyp detection methods, as well as describe additional experiments to further explore differences between methods. We define performance metrics and provide evaluation databases that allow comparison of multiple methodologies. Results show that convolutional neural networks are the state of the art. Nevertheless, it is also demonstrated that combining different methodologies can lead to an improved overall performance.
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15
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Towards Real-Time Polyp Detection in Colonoscopy Videos: Adapting Still Frame-Based Methodologies for Video Sequences Analysis. LECTURE NOTES IN COMPUTER SCIENCE 2017. [DOI: 10.1007/978-3-319-67543-5_3] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Won Y, Park B, Kim I, Lee S. Fluorescence lifetime measurement with confocal endomicroscopy for direct analysis of tissue biochemistry in vivo. Heliyon 2016; 2:e00139. [PMID: 27547835 PMCID: PMC4983142 DOI: 10.1016/j.heliyon.2016.e00139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 07/06/2016] [Accepted: 08/02/2016] [Indexed: 12/20/2022] Open
Abstract
Confocal endomicroscopy is a powerful tool for in vivo real-time imaging at cellular resolution inside a living body without tissue resection. Microscopic fluorescence lifetime measurement can provide information about localized biochemical conditions such as pH and the concentrations of oxygen and calcium. We hypothesized that combining these techniques could assist accurate cancer discrimination by providing both biochemical and morphological information. We designed a dual-mode experimental setup for confocal endomicroscopic imaging and fluorescence lifetime measurement and applied it to a mouse xenograft model of activated human pancreatic cancer generated by subcutaneous injection of AsPC-1 tumor cells. Using this method with pH-sensitive sodium fluorescein injection, we demonstrated discrimination between normal and cancerous tissues in a living mouse. With further development, this method may be useful for clinical cancer detection.
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Affiliation(s)
- Youngjae Won
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju, Chungbuk, 28160, Republic of Korea
| | - Byungjun Park
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju, Chungbuk, 28160, Republic of Korea
| | - Inwook Kim
- Catholic Research Institute of Medical Science, The Catholic University of Korea, Seoul, 137-071, Republic of Korea
| | - Seungrag Lee
- Medical Device Development Center, Osong Medical Innovation Foundation, Cheongju, Chungbuk, 28160, Republic of Korea
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17
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Beg S, Wilson A, Ragunath K. The use of optical imaging techniques in the gastrointestinal tract. Frontline Gastroenterol 2016; 7:207-215. [PMID: 27429735 PMCID: PMC4941161 DOI: 10.1136/flgastro-2015-100563] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 05/15/2015] [Accepted: 05/19/2015] [Indexed: 02/04/2023] Open
Abstract
With significant advances in the management of gastrointestinal disease there has been a move from diagnosing advanced pathology, to detecting early lesions that are potentially amenable to curative endoscopic treatment. This has required an improvement in diagnostics, with a focus on identifying and characterising subtle mucosal changes. There is great interest in the use of optical technologies to predict histology and enable the formulation of a real-time in vivo diagnosis, a so-called 'optical biopsy'. The aim of this review is to explore the evidence for the use of the current commercially available imaging techniques in the gastrointestinal tract.
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Affiliation(s)
- Sabina Beg
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Queens Medical Centre Campus, Nottingham, UK
| | - Ana Wilson
- Department of Gastroenterology, Wolfson Unit for Endoscopy, St Mark's hospital, London, UK
| | - Krish Ragunath
- NIHR Biomedical Research Unit in Gastrointestinal and Liver Diseases at Nottingham University Hospitals NHS Trust and The University of Nottingham, Queens Medical Centre Campus, Nottingham, UK
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18
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Iacucci M, Poon T, Gui XS, Ghosh S. High definition i-SCAN endoscopy with water immersion technique accurately reflects histological severity of celiac disease. Endosc Int Open 2016; 4:E540-6. [PMID: 27227112 PMCID: PMC4874797 DOI: 10.1055/s-0042-105955] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 03/07/2016] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND AND AIMS Severe villous atrophy can be revealed with conventional white light endoscopy (WLE), however, milder grades or patchy villous atrophy are more difficult to detect. Novel endoscopic techniques such as high definition i-SCAN endoscopy with the water immersion technique (i-SCAN-HDWI) may provide the ability to visualize duodenal villi more accurately. We aimed to determine the performance of i-SCAN-HDWI in evaluating the severity of histological damage in the duodenum of patients with celiac disease. PATIENTS AND METHODS A retrospective cohort study was performed in a single tertiary academic endoscopic center. We studied 58 patients (46 women; median age 36.5 years, range 18 - 72 years) with positive anti-TTG IgA antibody. The villous pattern of the second part of the duodenum was assessed by WLE and i-SCAN-HDWI. The endoscopic grades in both techniques were correlated using Marsh histologic grades by Spearman correlation coefficient. The diagnostic accuracy of i-SCAN-HDWI for detection of patchy or complete atrophy of the villi was evaluated. RESULTS A significant correlation was demonstrated between endoscopic grade using i-SCAN-HDWI and Marsh histologic grade (r = 0.732; P < 0.00001). The correlation between WLE grade and Marsh histologic grade was inferior to i-SCAN-HDWI (r = 0.31; P = 0.01). The sensitivity of i-SCAN-HDWI was 96 % (95 %CI: 85 - 99 %) and the specificity was 63 % (95 %CI: 26 - 90 %) in diagnosing abnormal biopsy consistent with celiac disease. CONCLUSION i-SCAN-HDWI endoscopy can reflect the histological severity of celiac disease more accurately than conventional WLE alone. This novel endoscopic imaging can improve the diagnostic yield of duodenal biopsies in celiac patients, especially for those with a patchy distribution of villous damage.
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Affiliation(s)
- Marietta Iacucci
- Gastroenterology, University of Calgary, Calgary, AB, Canada,Corresponding author Marietta Iacucci, MD PhD Division of GastroenterologyTRW 6D253280 Hospital Drive NWCalgaryAlbertaCanada T2N 4Z6+1-403-592-5090
| | - Tiffany Poon
- Gastroenterology, University of Calgary, Calgary, AB, Canada
| | - X. Sean Gui
- Pathology, University of Calgary, Calgary, AB, Canada
| | - Subrata Ghosh
- Gastroenterology, University of Calgary, Calgary, AB, Canada
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19
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Abstract
Despite the remarkable progress recently made to enhance the resolution of white-light endoscopy, detection, and diagnosis of premalignant lesions, such as adenomas and subtle early-stage cancers, remains a great challenge. As for example, although chromoendoscopy, such as endoscopy using indigo carmine, is useful for the early diagnosis of subtle lesions, the technique presents various disadvantages ranging from the time required for spray application of the dye and suctioning of excess dye to the increased difficulty in identifying lesions in the presence of severe inflammation and obstruction of visual field due to the pooling of solution in depressed-type lesions. To overcome these diagnostic problems associated with chromoendoscopy, research has focused on the development of endoscopes based on new optical technologies. Several types of image-enhanced endoscopy methods have recently been presented. In particular, image-enhanced endoscopy has emerged as a new paradigm for the diagnosis of gastrointestinal disorders. Image-enhanced endoscopes provide high-contrast images of lesions by means of optical or electronic technologies, including the contrast enhancement of the mucosal surface and of blood vessels. Chromoendoscopy, narrow-band imaging, i-SCAN, and flexible spectral imaging color enhancement are representative examples of image-enhanced endoscopy discussed in this paper.
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Affiliation(s)
- Jae-Young Jang
- Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
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20
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Ko WJ, An P, Ko KH, Hahm KB, Hong SP, Cho JY. Image Quality Analysis of Various Gastrointestinal Endoscopes: Why Image Quality Is a Prerequisite for Proper Diagnostic and Therapeutic Endoscopy. Clin Endosc 2015; 48:374-9. [PMID: 26473119 PMCID: PMC4604274 DOI: 10.5946/ce.2015.48.5.374] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 06/30/2015] [Accepted: 08/04/2015] [Indexed: 01/07/2023] Open
Abstract
Arising from human curiosity in terms of the desire to look within the human body, endoscopy has undergone significant advances in modern medicine. Direct visualization of the gastrointestinal (GI) tract by traditional endoscopy was first introduced over 50 years ago, after which fairly rapid advancement from rigid esophagogastric scopes to flexible scopes and high definition videoscopes has occurred. In an effort towards early detection of precancerous lesions in the GI tract, several high-technology imaging scopes have been developed, including narrow band imaging, autofocus imaging, magnified endoscopy, and confocal microendoscopy. However, these modern developments have resulted in fundamental imaging technology being skewed towards red-green-blue and this technology has obscured the advantages of other endoscope techniques. In this review article, we have described the importance of image quality analysis using a survey to consider the diversity of endoscope system selection in order to better achieve diagnostic and therapeutic goals. The ultimate aims can be achieved through the adoption of modern endoscopy systems that obtain high image quality.
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Affiliation(s)
- Weon Jin Ko
- Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Pyeong An
- Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Kwang Hyun Ko
- Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Ki Baik Hahm
- Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Sung Pyo Hong
- Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Joo Young Cho
- Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea
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21
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Fluorescence-Raman dual modal endoscopic system for multiplexed molecular diagnostics. Sci Rep 2015; 5:9455. [PMID: 25820115 PMCID: PMC4377550 DOI: 10.1038/srep09455] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 03/05/2015] [Indexed: 12/20/2022] Open
Abstract
Optical endoscopic imaging, which was recently equipped with bioluminescence, fluorescence, and Raman scattering, allows minimally invasive real-time detection of pathologies on the surface of hollow organs. To characterize pathologic lesions in a multiplexed way, we developed a dual modal fluorescence-Raman endomicroscopic system (FRES), which used fluorescence and surface-enhanced Raman scattering nanoprobes (F-SERS dots). Real-time, in vivo, and multiple target detection of a specific cancer was successful, based on the fast imaging capability of fluorescence signals and the multiplex capability of simultaneously detected SERS signals using an optical fiber bundle for intraoperative endoscopic system. Human epidermal growth factor receptor 2 (HER2) and epidermal growth factor receptor (EGFR) on the breast cancer xenografts in a mouse orthotopic model were successfully detected in a multiplexed way, illustrating the potential of FRES as a molecular diagnostic instrument that enables real-time tumor characterization of receptors during routine endoscopic procedures.
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22
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Ianiro G, Gasbarrini A, Cammarota G. Endoscopic tools for the diagnosis and evaluation of celiac disease. World J Gastroenterol 2013; 19:8562-8570. [PMID: 24379573 PMCID: PMC3870501 DOI: 10.3748/wjg.v19.i46.8562] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 04/28/2013] [Indexed: 02/06/2023] Open
Abstract
Celiac disease (CD) is an autoimmune disease of the small bowel induced by ingestion of wheat, rye and barley. Current guidelines indicate histological analysis on at least four duodenal biopsies as the only way to diagnose CD. These indications are based on the conception of the inability of standard endoscopy to make diagnosis of CD and/or to drive biopsy sampling. Over the last years, technology development of endoscopic devices has greatly ameliorated the accuracy of macroscopic evaluation of duodenal villous pattern, increasing the diagnostic power of endoscopy of CD. The aim of this paper is to review the new endoscopic tools and procedures proved to be useful in the diagnosis of CD, such as chromoendoscopy, Fujinon Intelligent Chromo Endoscopy, Narrow Band Imaging, Optical Coherence Tomography, Water-Immersion Technique, confocal laser endomicroscopy, high-resolution magnification endoscopy, capsule endoscopy and I-Scan technology.
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23
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Werner I, Guo F, Bogert NV, Stock UA, Meybohm P, Moritz A, Beiras-Fernandez A. Methylene blue modulates transendothelial migration of peripheral blood cells. PLoS One 2013; 8:e82214. [PMID: 24340007 PMCID: PMC3858277 DOI: 10.1371/journal.pone.0082214] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 10/22/2013] [Indexed: 12/27/2022] Open
Abstract
Vasoplegia is a severe complication after cardiac surgery. Within the last years the administration of nitric oxide synthase inhibitor methylene blue (MB) became a new therapeutic strategy. Our aim was to investigate the role of MB on transendothelial migration of circulating blood cells, the potential role of cyclic cGMP, eNOS and iNOS in this process, and the influence of MB on endothelial cell apoptosis. Human vascular endothelial cells (HuMEC-1) were treated for 30 minutes or 2 hours with different concentrations of MB. Inflammation was mimicked by LPS stimulation prior and after MB. Transmigration of PBMCs and T-Lymphocytes through the treated endothelial cells was investigated. The influence of MB upon the different subsets of PBMCs (Granulocytes, T- and B-Lymphocytes, and Monocytes) was assessed after transmigration by means of flow-cytometry. The effect of MB on cell apoptosis was evaluated using Annexin-V and Propidium Iodide stainings. Analyses of the expression of cyclic cGMP, eNOS and iNOS were performed by means of RT-PCR and Western Blot. Results were analyzed using unpaired Students T-test. Analysis of endothelial cell apoptosis by MB indicated a dose-dependent increase of apoptotic cells. We observed time- and dose-dependent effects of MB on transendothelial migration of PBMCs. The prophylactic administration of MB led to an increase of transendothelial migration of PBMCs but not Jurkat cells. Furthermore, HuMEC-1 secretion of cGMP correlated with iNOS expression after MB administration but not with eNOS expression. Expression of these molecules was reduced after MB administration at protein level. This study clearly reveals that endothelial response to MB is dose- and especially time-dependent. MB shows different effects on circulating blood cell-subtypes, and modifies the release patterns of eNOS, iNOS, and cGMP. The transendothelial migration is modulated after treatment with MB. Furthermore, MB provokes apoptosis of endothelial cells in a dose/time-dependent manner.
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Affiliation(s)
- Isabella Werner
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Fengwei Guo
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Nicolai V. Bogert
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Ulrich A. Stock
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Patrick Meybohm
- Clinic of Anaesthesiology, Intensive Care Medicine and Pain Therapy, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Anton Moritz
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
| | - Andres Beiras-Fernandez
- Department of Thoracic and Cardiovascular Surgery, Johann-Wolfgang-Goethe University Hospital, Frankfurt/Main, Germany
- * E-mail:
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24
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Haidaris CG, Foster TH, Waldman DL, Mathes EJ, McNamara J, Curran T. Effective photodynamic therapy against microbial populations in human deep tissue abscess aspirates. Lasers Surg Med 2013; 45:509-16. [PMID: 23996629 DOI: 10.1002/lsm.22171] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND OBJECTIVE The primary therapy for deep tissue abscesses is drainage accompanied by systemic antimicrobial treatment. However, the long antibiotic course required increases the probability of acquired resistance, and the high incidence of polymicrobial infections in abscesses complicates treatment choices. Photodynamic therapy (PDT) is effective against multiple classes of organisms, including those displaying drug resistance, and may serve as a useful adjunct to the standard of care by reduction of abscess microbial burden following drainage. STUDY DESIGN/MATERIALS AND METHODS Aspirates were obtained from 32 patients who underwent image-guided percutaneous drainage of the abscess cavity. The majority of the specimens (24/32) were abdominal, with the remainder from liver and lung. Conventional microbiological techniques and nucleotide sequence analysis of rRNA gene fragments were used to characterize microbial populations from abscess aspirates. We evaluated the sensitivity of microorganisms to methylene blue-sensitized PDT in vitro both within the context of an abscess aspirate and as individual isolates. RESULTS Most isolates were bacterial, with the fungus Candida tropicalis also isolated from two specimens. We examined the sensitivity of these microorganisms to methylene blue-PDT. Complete elimination of culturable microorganisms was achieved in three different aspirates, and significant killing (P < 0.0001) was observed in all individual microbial isolates tested compared to controls. CONCLUSIONS These results and the technical feasibility of advancing optical fibers through catheters at the time of drainage motivate further work on including PDT as a therapeutic option during abscess treatment.
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Affiliation(s)
- Constantine G Haidaris
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, 14642; Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, 14642
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25
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Riaz A, Shreedhar B, Kamboj M, Natarajan S. Methylene blue as an early diagnostic marker for oral precancer and cancer. SPRINGERPLUS 2013; 2:95. [PMID: 23524482 PMCID: PMC3602613 DOI: 10.1186/2193-1801-2-95] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 02/25/2013] [Indexed: 11/10/2022]
Abstract
Oral cancer is one of the most common neoplasm's and is ranked eighth in the cancer incidence worldwide. Early detection is of critical importance because survival rates markedly improve. In vivo staining is a simple, inexpensive, and fairly sensitive method. Involved 120 patients (50 with Premalignant Lesion, 50 with OSCC and 20 controls) stained by Methylene Blue (MB). The results of MB uptake were compared with a simultaneous biopsy of these lesions. Pathologically confirmed precancers and cancers were the positive targets of this screening, while hyperkeratosis without dysplasia and no evidence of malignancy were sorted as negative subjects of screening. The results revealed sensitivity of 91.4%, specificity of 66.6%, positive predictive value 97.7% and negative predictive value 33% leading to diagnostic accuracy of MB stain to 90%. We state that MB staining is useful diagnostic tool in community oral cancer screening programmes for high-risk individuals.
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Affiliation(s)
- Akhtar Riaz
- Department of Oral Pathology and Microbiology, Career Post Graduate Institute of Dental Sciences and Hospital, C-1111, Indiranagar, Lucknow, 226016 India
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26
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Häfner M, Liedlgruber M, Uhl A, Vécsei A, Wrba F. Delaunay triangulation-based pit density estimation for the classification of polyps in high-magnification chromo-colonoscopy. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2012; 107:565-581. [PMID: 22325257 PMCID: PMC3414827 DOI: 10.1016/j.cmpb.2011.12.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 12/19/2011] [Accepted: 12/20/2011] [Indexed: 05/31/2023]
Abstract
In this work we propose a method to extract shape-based features from endoscopic images for an automated classification of colonic polyps. This method is based on the density of pits as used in the pit pattern classification scheme which is commonly used for the classification of colonic polyps. For the detection of pits we employ a noise-robust variant of the LBP operator. To be able to be robust against local texture variations we extend this operator by an adaptive thresholding. Based on the detected pit candidates we compute a Delaunay triangulation and use the edge lengths of the resulting triangles to construct histograms. These are then used in conjunction with the k-NN classifier to classify images. We show that, compared to a previously developed method, we are not only able to almost always get higher classification results in our application scenario, but that the proposed method is also able to significantly outperform the previously developed method in terms of the computational demand.
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Affiliation(s)
- M. Häfner
- St. Elisabeth Hospital, Department for Internal Medicine, Vienna, Austria
| | - M. Liedlgruber
- University of Salzburg, Department of Computer Sciences, 5020 Salzburg, Austria
| | - A. Uhl
- University of Salzburg, Department of Computer Sciences, 5020 Salzburg, Austria
| | - A. Vécsei
- St. Anna Children's Hospital, Endoscopy Unit, Vienna, Austria
| | - F. Wrba
- Medical University of Vienna, Department of Clinical Pathology, Vienna, Austria
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27
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Tang L, Li G, Sun YS, Li J, Zhang XP. Synchrotron-radiation phase-contrast imaging of human stomach and gastric cancer: in vitro studies. JOURNAL OF SYNCHROTRON RADIATION 2012; 19:319-322. [PMID: 22514164 DOI: 10.1107/s090904951200310x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
The electron density resolution of synchrotron-radiation phase-contrast imaging (SR-PCI) is 1000 times higher than that of conventional X-ray absorption imaging in light elements, through which high-resolution X-ray imaging of biological soft tissue can be achieved. For biological soft tissue, SR-PCI can give better imaging contrast than conventional X-ray absorption imaging. In this study, human resected stomach and gastric cancer were investigated using in-line holography and diffraction enhanced imaging at beamline 4W1A of the Beijing Synchrotron Radiation Facility. It was possible to depict gastric pits, measuring 50-70 µm, gastric grooves and tiny blood vessels in the submucosa layer by SR-PCI. The fine structure of a cancerous ulcer was displayed clearly on imaging the mucosa. The delamination of the gastric wall and infiltration of cancer in the submucosa layer were also demonstrated on cross-sectional imaging. In conclusion, SR-PCI can demonstrate the subtle structures of stomach and gastric cancer that cannot be detected by conventional X-ray absorption imaging, which prompt the X-ray diagnosis of gastric disease to the level of the gastric pit, and has the potential to provide new methods for the imageology of gastric cancer.
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Affiliation(s)
- Lei Tang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University School of Oncology, Beijing Cancer Hospital and Institute, No. 52 Fu Cheng Road, Hai Dian District, Beijing 100142, People's Republic of China
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28
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Galloro G. High technology imaging in digestive endoscopy. World J Gastrointest Endosc 2012; 4:22-27. [PMID: 22347528 PMCID: PMC3280351 DOI: 10.4253/wjge.v4.i2.22] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 11/21/2011] [Accepted: 02/06/2012] [Indexed: 02/05/2023] Open
Abstract
A thorough endoscopic visualization of the digestive mucosa is essential for reaching an accurate diagnosis and to treat the different lesions. Standard white light endoscopes permit a good mucosa examination but, nowadays, the introduction of powerful endoscopic instrumentations increased ability to analyze the finest details. By applying dyes and zoom-magnification endoscopy further architectural detail of the mucosa can be elucidated. New computed virtual chromoendoscopy have further enhanced optical capabilities for the evaluation of submucosal vascolar pattern. Recently, confocal endomicroscopy and endocytoscopy were proposed for the study of ultrastructural mucosa details. Because of the technological contents of powerful instrumentation, a good knowledge of implemented technologies is mandatory for the endoscopist, nowadays. Nevertheless, there is a big confusion about this topic. We will try to explain these technologies and to clarify this terminology.
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Affiliation(s)
- Giuseppe Galloro
- Giuseppe Galloro, Department of General, Geriatric, Oncologic Surgery and Advanced Technologies, Unit of Surgical Digestive Endoscopy, University of Naples "Federico II" - School of Medicine, Via S Pansini, 5 80131 Napoli, Italy
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29
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Pellisé M, Díaz Tasende J, Balaguer F, Bustamante-Balén M, Herráiz M, Herreros de Tejada A, Gimeno-García AZ, López-Cerón M, Marín JC, Parra Blanco A. [Technical review of advanced diagnostic endoscopy in patients at high risk of colorectal cancer]. GASTROENTEROLOGIA Y HEPATOLOGIA 2012; 35:278-92. [PMID: 22326908 DOI: 10.1016/j.gastrohep.2011.11.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Accepted: 11/23/2011] [Indexed: 12/25/2022]
Affiliation(s)
- Maria Pellisé
- Grupo EndoCAR (endoscopia avanzada para pacientes con alto riesgo de cáncer colorrectal)
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30
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Snell SB, Foster TH, Haidaris CG. Miconazole induces fungistasis and increases killing of Candida albicans subjected to photodynamic therapy. Photochem Photobiol 2011; 88:596-603. [PMID: 22077904 DOI: 10.1111/j.1751-1097.2011.01039.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cutaneous and mucocutaneous Candida infections are considered to be important targets for antimicrobial photodynamic therapy (PDT). Clinical application of antimicrobial PDT will require strategies that enhance microbial killing while minimizing damage to host tissue. Increasing the sensitivity of infectious agents to PDT will help achieve this goal. Our previous studies demonstrated that raising the level of oxidative stress in Candida by interfering with fungal respiration increased the efficiency of PDT. Therefore, we sought to identify compounds in clinical use that would augment the oxidative stress caused by PDT by contributing to reactive oxygen species (ROS) formation themselves. Based on the ability of the antifungal miconazole to induce ROS in Candida, we tested several azole antifungals for their ability to augment PDT in vitro. Although miconazole and ketoconazole both stimulated ROS production in Candida albicans, only miconazole enhanced the killing of C. albicans and induced prolonged fungistasis in organisms that survived PDT using the porphyrin TMP-1363 and the phenothiazine methylene blue as photosensitizers. The data suggest that miconazole could be used to increase the efficacy of PDT against C. albicans, and its mechanism of action is likely to be multifactorial.
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Affiliation(s)
- Sara B Snell
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, USA
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Affiliation(s)
- Jayan Mannath
- Nottingham Digestive Diseases Centre and NIHR Biomedical Research Unit, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
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32
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Color treatment in endoscopic image classification using multi-scale local color vector patterns. Med Image Anal 2011; 16:75-86. [PMID: 21624846 PMCID: PMC3280718 DOI: 10.1016/j.media.2011.05.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 04/15/2011] [Accepted: 05/05/2011] [Indexed: 12/26/2022]
Abstract
In this work we propose a novel method to describe local texture properties within color images with the aim of automated classification of endoscopic images. In contrast to comparable Local Binary Patterns operator approaches, where the respective texture operator is almost always applied to each color channel separately, we construct a color vector field from an image. Based on this field the proposed operator computes the similarity between neighboring pixels. The resulting image descriptor is a compact 1D-histogram which we use for a classification using the k-nearest neighbors classifier. To show the usability of this operator we use it to classify magnification-endoscopic images according to the pit pattern classification scheme. Apart from that, we also show that compared to previously proposed operators we are not only able to get competitive classification results in our application scenario, but that the proposed operator is also able to outperform the other methods either in terms of speed, feature compactness, or both.
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33
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Brown SR, Baraza W. Chromoscopy versus conventional endoscopy for the detection of polyps in the colon and rectum. Cochrane Database Syst Rev 2010:CD006439. [PMID: 20927746 DOI: 10.1002/14651858.cd006439.pub3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Although conventional colonoscopy is the most sensitive test available for the investigation of the colorectum for polyps, there are data that raise concerns about its sensitivity. Chromoscopy may be one way of enhancing the ability for colonoscopy to detect polyps particularly diminutive flat lesions that may be otherwise difficult to detect. OBJECTIVES To determine whether the use of chromoscopy enhances detection of polyps and neoplasia during endoscopic examination of the colon and rectum. SEARCH STRATEGY MEDLINE, EMBASE and the Cochrane Library databases were searched (April 2010) along with a hand search of abstracts from relevant meetings. Search terms included randomised trials containing combinations of the following: 'chromoscopy' 'colonoscopy' 'dye-spray' 'chromo-endoscopy' 'indigo-carmine' 'magnifying endoscopy'. SELECTION CRITERIA All prospective randomised trials comparing chromoscopic with conventional endoscopic examination of the lower gastrointestinal tract were included. Patients with inflammatory bowel disease or polyposis syndromes were excluded. DATA COLLECTION AND ANALYSIS Two reviewers assessed the methodological quality of potentially eligible trials and independently extracted data from the included trials. Outcome measures included the detection of polyps (neoplastic and non-neoplastic), the detection of diminutive lesions, the number of patients with multiple neoplastic lesions and the extubation time. MAIN RESULTS Five trials were included in this update, and although there were some methodological drawbacks and differences in study design, combining the results showed a significant difference in favour of chromoscopy for all detection outcomes. In particular, chromoscopy is likely to yield significantly more patients with at least one neoplastic lesion (OR 1.67 (CI 1.29-2.15)) and significantly more patients with three or more neoplastic lesions (OR 2.55 (CI 1.49-4.36)). Not surprisingly the withdrawal times were significantly slower for the chromoscopy group. AUTHORS' CONCLUSIONS There appears to be strong evidence that chromoscopy enhances the detection of neoplasia in the colon and rectum. Patients with neoplastic polyps, particularly those with multiple polyps, are at increased risk of developing colorectal cancer. Such lesions, which presumably would be missed with conventional colonoscopy, could contribute to the interval cancer numbers on any surveillance programme.
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Affiliation(s)
- Steven R Brown
- Surgery, Sheffield Teaching Hospitals, Dept Surgery, Northern General Hospital, Herried Road, Sheffield S7, South Yorkshire, UK, S5 7AU
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34
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Dinis-Ribeiro MJ, Correia RC, Santos C, Fernandes S, Palhares E, Silva RA, Amaro P, Areia M, Costa-Pereira A, Moreira-Dias L. Web-based system for training and dissemination of a magnification chromoendoscopy classification. World J Gastroenterol 2008; 14:7086-92. [PMID: 19084915 PMCID: PMC2776838 DOI: 10.3748/wjg.14.7086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the use of web-based technologies to assess the learning curve and reassess reproducibility of a simplified version of a classification for gastric magnification chromoendoscopy (MC).
METHODS: As part of a multicenter trial, a hybrid approach was taken using a CD-ROM, with 20 films of MC lasting 5 s each and an “autorun” file triggering a local HTML frameset referenced to a remote questionnaire through an Internet connection. Three endoscopists were asked to prospectively and independently classify 10 of these films randomly selected with at least 3 d apart. The answers were centrally stored and returned to participants together with adequate feedback with the right answer.
RESULTS: For classification in 3 groups, both intra- [Cohen’s kappa (κ) = 0.79-1.00 to 0.89-1.00] and inter-observer agreement increased from 1st (moderate) to 6th observation (κ = 0.94). Also, agreement with reference increased in the last observations (0.90, 1.00 and 1.00, for observers A, B and C, respectively). Validity of 100% was obtained by all observers at their 4th observation. When a 4th (sub)group was considered, inter-observer agreement was almost perfect (κ = 0.92) at 6th observation. The relation with reference clearly improved into κ (0.93-1.00) and sensitivity (75%-100%) at their 6th observations.
CONCLUSION: This MC classification seems to be easily explainable and learnable as shown by excellent intra- and inter-observer agreement, and improved agreement with reference. A web system such as the one used in this study may be useful for endoscopic or other image based diagnostic procedures with respect to definition, education and dissemination.
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35
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Emerging technologies in upper gastrointestinal endoscopy and celiac disease. ACTA ACUST UNITED AC 2008; 6:47-56. [PMID: 19002131 DOI: 10.1038/ncpgasthep1298] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Accepted: 10/06/2008] [Indexed: 12/12/2022]
Abstract
Despite advances in our knowledge of celiac disease, the most current and authoritative recommendations conclude that diagnosis requires at least four biopsy specimens to be taken from the duodenal area. These recommendations are based on the perception that classic endoscopic markers are not adequate to target biopsy sampling to sites of villous damage in the duodenum. In the past few years, newly developed procedures and technologies have improved endoscopic recognition of the duodenum. These advances make possible the real-time recognition of the duodenal villous pattern during an upper endoscopy procedure, and thereby have the potential to optimize diagnostic accuracy. It is, therefore, reasonable to hypothesize that upper endoscopy might have a more incisive role in the diagnosis of celiac disease than merely providing a means of obtaining biopsy specimens for histological analysis. This Review highlights the new technologies in the field of upper endoscopy that could be helpful for the diagnosis of celiac disease, including the water-immersion technique, chromoendoscopy, high-resolution magnification endoscopy, optimal band imaging, optical coherence tomography and confocal endomicroscopy.
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36
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Bader FG, Bouchard R, Keller R, Mirow L, Czymek R, Habermann JK, Fritsch H, Bruch HP, Roblick UJ. [Progress in diagnostics of anorectal disorders. Part I: anatomic background and clinical and neurologic procedures]. Chirurg 2008; 79:401-9. [PMID: 18414817 DOI: 10.1007/s00104-008-1545-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Diagnostics and therapy of anorectal disorders are still questions of surgery. Exact knowledge of functional anatomy and precise clinical examination constitute the basis for the resulting therapeutic strategies. Three-dimensional endosonography and technical advances in flexible endoscopy using high-resolution chromoendoscopy and narrow-band imaging enable exact staging and diagnosis, even of malignancies in earliest stages. Furthermore new in-vivo staining methods combined with high-resolution imaging facilitate the discrimination of inflammatory and neoplastic lesions, which often lead to diagnostic difficulties in chronic inflammatory bowel disease. Developments in neurologic testing, including surface electromyography and sacral nerve stimulation, complement the diagnostic armamentarium.
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Affiliation(s)
- F G Bader
- Klinik für Chirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Ratzeburgerallee 160, 23538 Lübeck
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37
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Jichlinski P, Lovisa B, Erling C, Aymon D, van den Berg H, Wagnieres G. [Fluorescence cystoscopy. Perspective in clinical practice and research]. Urologe A 2008; 47:975-7. [PMID: 18516580 DOI: 10.1007/s00120-008-1778-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Many studies confirm the clinical interest of photodynamic diagnostics (PDD) in non-muscle invasive bladder cancer management. PDD or fluorescence cystoscopy is not only of great value in occult urothelial cancer detection, but may have a positive impact on disease-free survival and prognosis. Yet, its specificity is found to be highly variable between studies mainly in relation to different disease profiles. New imaging techniques aimed at enhancing visualization to assess the bladder wall are under development.
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Affiliation(s)
- P Jichlinski
- Universitätsklinik für Urologie, CHUV Hospital, CH-1011, Lausanne, Switzerland.
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38
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Zanoni ECA, Cutait R, Averbach M, de Oliveira LAR, Teixeira CR, Corrêa PAFP, Paccos JL, Rossini GF, Câmara Lopes LH. Magnifying colonoscopy: interobserver agreement in the assessment of colonic pit patterns and its correlation with histopathological findings. Int J Colorectal Dis 2007; 22:1383-8. [PMID: 17579873 DOI: 10.1007/s00384-007-0336-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/22/2007] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND STUDY AIMS Magnifying colonoscopy (MC) is recognized as an aid to the differential diagnosis between neoplastic and nonneoplastic lesions. This study evaluated interobserver agreement of experienced endoscopists in the assessment of colonic pit patterns through the Kudo's classification and correlated morphological aspects with histopathological findings. MATERIALS AND METHODS A total of 213 magnification chromoendoscopic pictures of colonic lesions were collected from 161 consecutive patients and presented to three independent observers who expressed opinion about predominant pit pattern. All lesions were excised and sent for histopathological study. RESULTS Kappa statistics showed that the general agreement index with respect to the aspects of the pits was good among the three observers (0.561). Regarding prediction of histopathology according to the pit pattern diagnosis, overall accuracy was 84%, sensitivity was 91.4%, specificity was 67.2%, positive predictive value was 86.6%, and negative predictive value was 79.3%. CONCLUSION Although the interobserver reproducibility of the colonic pit pattern is good for experienced endoscopists, MC must not be used to replace the histopathological analysis, since it does not differentiate with the necessary safety neoplastic from nonneoplastic lesions.
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Brown SR, Baraza W, Hurlstone P. Chromoscopy versus conventional endoscopy for the detection of polyps in the colon and rectum. Cochrane Database Syst Rev 2007:CD006439. [PMID: 17943910 DOI: 10.1002/14651858.cd006439.pub2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Although conventional colonoscopy is the most sensitive test available for the investigation of the colorectum for polyps, there are data that raise concerns about its sensitivity. Chromoscopy may be one way of enhancing the ability for colonoscopy to detect polyps particularly diminutive flat lesions that may be otherwise difficult to detect. OBJECTIVES To determine whether the use of chromoscopy enhances detection of polyps and neoplasia during endoscopic examination of the colon and rectum. SEARCH STRATEGY MEDLINE, EMBASE and the Cochrane Library databases were searched along with a hand search of abstracts from relevant meetings. Search terms included randomised trials containing combinations of the following: 'chromoscopy' 'colonoscopy' 'dye-spray' 'chromo-endoscopy' 'indigo-carmine' 'magnifying endoscopy'. SELECTION CRITERIA All prospective randomised trials comparing chromoscopic with conventional endoscopic examination of the lower gastrointestinal tract were included. Patients with inflammatory bowel disease or polyposis syndromes were excluded. DATA COLLECTION AND ANALYSIS Three reviewers assessed the methodological quality of potentially eligible trials and independently extracted data from the included trials. Outcome measures included the detection of polyps (neoplastic and non-neoplastic), the detection of diminutive lesions, the number of patients with multiple neoplastic lesions and the extubation time. MAIN RESULTS Four trials were include that met the inclusion criteria and although there were some methodological drawbacks and differences in study design, combining the results showed a significant difference in favour of chromoscopy for all detection outcomes. In particular, chromoscopy is likely to yield significantly more patients with at least one neoplastic lesion (OR 1.61 (CI 1.24-2.09)) and significantly more patients with three or more neoplastic lesions (OR 2.55 (CI 1.49-4.36)). Not surprisingly the withdrawal times were significantly slower for the chromoscopy group. AUTHORS' CONCLUSIONS There appears to be strong evidence that chromoscopy enhances the detection of neoplasia in the colon and rectum. Patients with neoplastic polyps, particularly those with multiple polyps, are at increased risk of developing colorectal cancer. Such lesions, which presumably would be missed with conventional colonoscopy, could contribute to the interval cancer numbers on any surveillance programme.
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Affiliation(s)
- S R Brown
- Sheffield Teaching Hospitals, Surgery, Dept Surgery, Northern General Hospital, Herries Rd, Sheffield, South Yorkshire, UK, S5 7AU.
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40
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Dinis-Ribeiro M, da Costa-Pereira A, Lopes C, Moreira-Dias L. Feasibility and cost-effectiveness of using magnification chromoendoscopy and pepsinogen serum levels for the follow-up of patients with atrophic chronic gastritis and intestinal metaplasia. J Gastroenterol Hepatol 2007; 22:1594-604. [PMID: 17845687 DOI: 10.1111/j.1440-1746.2007.04863.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The follow-up of patients with atrophic chronic gastritis or intestinal metaplasia may lead to early diagnosis of gastric cancer. However, to-date no cost-effective model has been proposed. Improved endoscopic examination using magnification chromoendoscopy together with non-invasive functional assessment with pepsinogen serum levels are accurate in the diagnosis of intestinal metaplasia (extension) and minute dysplastic lesions. The aim of this study was to assess the feasibility and cost-effectiveness of a follow-up model for patients with atrophic chronic gastritis and intestinal metaplasia based on gastric mucosal status using magnification chromoendoscopy and pepsinogen. METHODS A cohort of patients with lesions as severe as atrophic chronic gastritis were followed-up according to a standardized protocol using magnification chromoendoscopy with methylene blue and measurement of serum pepsinogen I and II levels. A single node decision tree and Markov chain modeling were used to define cost-effectiveness of this follow-up model versus its absence. Transition rates were considered time-independent and calculated using primary data following cohort data analysis. Costs, quality of life and survival were estimated based on published data and extensive sensitivity analysis was performed. RESULTS A total of 100 patients were successfully followed-up over 3 years. Seven cases of dysplasia were diagnosed during follow-up, all among patients with incomplete intestinal metaplasia at baseline, six of whom had extensive (pepsinogen I to II ratio <3) incomplete intestinal metaplasia. For those individuals with atrophic chronic gastritis or complete intestinal metaplasia, a yearly measurement of pepsinogen levels or an endoscopic examination on a 3-yearly basis would cost 455 euros per quality-adjusted life year (QALY) gain. Endoscopic examination and pepsinogen serum level measurement on a yearly basis would cost 1868 euros per QALY for patients with extensive intestinal metaplasia. CONCLUSIONS The follow-up of patients with atrophic chronic gastritis or intestinal metaplasia is both feasible and cost-effective if improved accurate endoscopic examination of gastric mucosa together with non-invasive assessment of gastric mucosal status are used to identify individuals at high-risk for development of gastric cancer.
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Affiliation(s)
- Mário Dinis-Ribeiro
- Department of Gastroenterology, Portuguese Oncology Institute, Porto, Portugal.
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41
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Galli J, Cammarota G, Rigante M, De Corso E, Parrilla C, Passali GC, Almadori G, Paludetti G. High resolution magnifying endoscopy: a new diagnostic tool also for laryngeal examination? ACTA OTORHINOLARYNGOLOGICA ITALICA : ORGANO UFFICIALE DELLA SOCIETA ITALIANA DI OTORINOLARINGOLOGIA E CHIRURGIA CERVICO-FACCIALE 2007; 27:233-236. [PMID: 18198752 PMCID: PMC2640033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/30/2007] [Accepted: 07/30/2007] [Indexed: 05/25/2023]
Abstract
Aim of this report is to introduce the use of a new high resolution magnifying endoscope in the endoscopic examination of the upper aerodigestive tract and discuss the usefulness of this tool in the diagnosis of laryngeal lesions. A total of 26 patients presenting various laryngeal disorders were examined by means of an electronic videoendoscope and a high resolution magnifying endoscope. The images obtained were examined and compared. High resolution high magnification endoscopic examination allowed a better description of the laryngeal lesions (colour, extension and thickness of the lesion, irregularities in surface and borders) with easy characterisation of aspect of neighbouring laryngeal mucosa especially in pre-malignant lesions. Furthermore, the optical magnifying zoom does not require a close approach to the laryngeal mucosa, therefore, local anaesthesia is not required. In conclusion, the high resolution magnified images obtained with this new tool provide important information on the characteristics of the laryngeal structures. This new endoscopic technology, as already occurred in gastric, oesophageal and colorectal disorders, could also be improved by using chromo-endoscopy and other vital stain techniques in order to provide useful information concerning pre-neoplastic lesions of the larynx.
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Affiliation(s)
- J Galli
- Institute of Otolaryngology and Gastroenterology, Catholic University of the Sacred Heart, Rome, Italy.
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42
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Picasso M, Filiberti R, Blanchi S, Conio M. The role of chromoendoscopy in the surveillance of the duodenum of patients with familial adenomatous polyposis. Dig Dis Sci 2007; 52:1906-9. [PMID: 17406831 DOI: 10.1007/s10620-006-9653-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 10/15/2006] [Indexed: 12/16/2022]
Abstract
Adenomas of the duodenum have been described in patients with familial adenomatous polyposis (FAP). Patients with FAP are at high risk for the development of periampullary cancer. The aim of our study was to evaluate if endoscopic visualization of small polyps, often overlooked at standard endoscopic examination, was improved by chromoendoscopy. Ten patients with FAP and previous colectomy underwent upper gastrointestinal endoscopy. Two skilled endoscopists were involved for each endoscopy. Evaluation of number and diameter of polyps was made before and after staining. After staining we detected a larger number of duodenal polyps than found at the standard endoscopic examination, the difference being statistically significant. This result seems to suggest that chromoendoscopy may improve diagnostic yield of endoscopy. Further studies are needed to suggest the best surveillance program and the appropriate therapeutic modality for these patients.
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Affiliation(s)
- Massimo Picasso
- Department of Gastroenterology, Sanremo Hospital, Corso Garibaldi 187, 3, 18038, Sanremo (IM), Italy
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43
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Kerkhof M, van Dekken H, Steyerberg EW, Meijer GA, Mulder AH, de Bruïne A, Driessen A, ten Kate FJ, Kusters JG, Kuipers EJ, Siersema PD. Grading of dysplasia in Barrett's oesophagus: substantial interobserver variation between general and gastrointestinal pathologists. Histopathology 2007; 50:920-7. [PMID: 17543082 DOI: 10.1111/j.1365-2559.2007.02706.x] [Citation(s) in RCA: 182] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AIMS To determine interobserver variation in grading of dysplasia in Barrett's oesophagus (BO) between non-expert general pathologists and expert gastrointestinal pathologists on the one hand and between expert pathologists on the other hand. METHODS AND RESULTS In this prospective multicentre study, non-expert and expert pathologists graded biopsy specimens of 920 patients with endoscopic BO, which were blindly reviewed by one member of a panel of expert pathologists (panel experts) and by a second panel expert in case of disagreement on dysplasia grade. Agreement between two of three pathologists was established as the final diagnosis. Analysis was performed by kappa statistics. Due to absence of intestinal metaplasia, 127/920 (14%) patients were excluded. The interobserver agreement for dysplasia [no dysplasia (ND) versus indefinite for dysplasia/low-grade dysplasia (IND/LGD) versus high-grade dysplasia (HGD)/adenocarcinoma (AC)] between non-experts and first panel experts and between initial experts and first panel experts was fair (kappa = 0.24 and kappa = 0.27, respectively), and substantial for differentiation of HGD/AC from ND/IND/LGD (kappa = 0.62 and kappa = 0.58, respectively). CONCLUSIONS There was considerable interobserver variability in the interpretation of ND or IND/LGD in BO between non-experts and experts, but also between expert pathologists. This suggests that less subjective markers are needed to determine the risk of developing AC in BO.
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Affiliation(s)
- M Kerkhof
- Department of Gastroenterology and Hepatology, Erasmus MC-University Medical Centre Rotterdam, Rotterdam, The Netherlands.
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Davies J, Burke D, Olliver JR, Hardie LJ, Wild CP, Routledge MN. Methylene blue but not indigo carmine causes DNA damage to colonocytes in vitro and in vivo at concentrations used in clinical chromoendoscopy. Gut 2007; 56:155-6. [PMID: 17172595 PMCID: PMC1856667 DOI: 10.1136/gut.2006.107300] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Anagnostopoulos GK, Ragunath K, Shonde A, Hawkey CJ, Yao K. Diagnosis of autoimmune gastritis by high resolution magnification endoscopy. World J Gastroenterol 2006; 12:4586-4587. [PMID: 16874879 PMCID: PMC4125654 DOI: 10.3748/wjg.v12.i28.4586] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2006] [Revised: 01/12/2006] [Accepted: 01/24/2006] [Indexed: 02/06/2023] Open
Abstract
Endoscopic visualisation of gastric atrophy is usually not feasible with conventional endoscopy. Magnifying endoscopy is helpful to analyze the subepithelial microvascular architecture as well as the mucosal surface microstructure without tissue biopsy. Using this technique we were able to describe the normal gastric microvasculature pattern and we also identified characteristic patterns in two cases of autoimmune atrophic gastritis.
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van Dekken H, Wink JC, Vissers KJ, van Marion R, Koppert LB, Tilanus HW, Siersema PD, Tanke HJ, Szuhai K, Hop WCJ. Genomic analysis of early adenocarcinoma of the esophagus or gastroesophageal junction: tumor progression is associated with alteration of 1q and 8p sequences. Genes Chromosomes Cancer 2006; 45:516-25. [PMID: 16479570 DOI: 10.1002/gcc.20315] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Early (T1 stage) adenocarcinoma of the esophagus or gastroesophageal junction is a potentially curable disease. We analyzed the genomic spectra of 33 early neoplastic lesions after subdividing the tumors into six depths of invasion (T1-mucosal, m1-m3; T1-submucosal, sm1-sm3). Two subgroups were defined, T1m1-sm1 (n = 18) and T1sm2-sm3 (n = 15). The latter group is associated with frequent lymphatic spread and a high percentage of local and/or distant recurrence. Comparative genomic hybridization with a genomewide 3,500-element BAC-PAC array revealed a characteristic gastroesophageal adenocarcinoma pattern of changes, with losses on chromosome arms 4pq, 5q, 8p, 9p, 17p, and 18q and gains on 1q, 6p, 7pq, 11q, 15q, 17q, and 20pq. However, when the two groups were compared, the following BAC clones showed significantly more alterations in the T1sm2-sm3 group: RP11-534L20 (1q32.1) and RP11-175A4 (6p21.32), showing gains, and RP11-356F24, RP11-433L7, and RP11-241P12 (all at 8p), showing losses. Gain of RP11-534L20 (1q32.1) and loss of RP11-433L7 (8p22) were associated not only with a recurrence-free period (P = 0.0007 and 0.007, respectively), but also with regional lymphatic dissemination (P = 0.005 and 0.003, respectively). These DNA clones can be considered genomic markers for the aggressive behavior of early esophageal and gastroesophageal junction adenocarcinoma.
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Affiliation(s)
- Herman van Dekken
- Department of Pathology, Erasmus MC University Medical Center, Josephine Nefkens Institute, Rotterdam, The Netherlands.
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Fortun PJ, Anagnostopoulos GK, Kaye P, James M, Foley S, Samuel S, Shonde A, Badreldin R, Campbell E, Hawkey CJ, Ragunath K. Acetic acid-enhanced magnification endoscopy in the diagnosis of specialized intestinal metaplasia, dysplasia and early cancer in Barrett's oesophagus. Aliment Pharmacol Ther 2006; 23:735-742. [PMID: 16556175 DOI: 10.1111/j.1365-2036.2006.02823.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Barrett's surveillance is prone to sampling error. Aim To determine whether enhanced magnification endoscopy using acetic acid instillation improves diagnostic accuracy of specialized intestinal metaplasia/dysplasia in Barrett's oesophagus. METHODS We examined the detection rate of the specialized intestinal metaplasia/dysplasia in 64 consecutive patients with Barrett's oesophagus using acetic acid to enhance mucosal pit patterns. Histology was compared with the previous findings at recent conventional surveillance in 62 patients. We also examined the inter-/intra-observer agreement in the assessment of the enhanced magnification endoscopy pit pattern findings. RESULTS Histology revealed columnar-lined oesophagus in six (9%) patients, specialized intestinal metaplasia in 49 (77%), low-grade dysplasia in five (8%), high-grade dysplasia in one (2%), and adenocarcinoma in three (5%). There was discordance between the histologic findings from conventional surveillance with random biopsy. Fifteen patients (24%) had a histological upgrade with enhanced magnification endoscopy. There was a high detection rate of specialized intestinal metaplasia even in short segment Barrett's oesophagus (74%), and additionally, there were two cancers, one with 2-cm Barrett's oesophagus and one ultra-short (1 cm). The mean kappa values for inter- and intra-observer agreement in assessing the pit patterns were 0.571 (0.041) and 0.709 (0.038), respectively. CONCLUSIONS Enhanced magnification endoscopy allows clear visualization of the epithelial pit patterns within Barrett's oesophagus, and targeted biopsy results in a high yield of specialized intestinal metaplasia and dysplasia.
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Affiliation(s)
- P J Fortun
- Wolfson Digestive Diseases Centre, and Department of Histopathology, Queen's Medical Centre, University Hospital, Nottingham, UK
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Le Rhun M, Coron E, Parlier D, Nguyen JM, Canard JM, Alamdari A, Sautereau D, Chaussade S, Galmiche JP. High resolution colonoscopy with chromoscopy versus standard colonoscopy for the detection of colonic neoplasia: a randomized study. Clin Gastroenterol Hepatol 2006; 4:349-54. [PMID: 16527699 DOI: 10.1016/j.cgh.2005.12.009] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS High-resolution colonoscopy with chromoscopy (HRC) is a technique designed to improve the detection of colonic neoplasias. We prospectively compared standard colonoscopy (SC) and HRC in a randomized multicenter trial. METHODS Patients (n = 203; age, 58 +/- 10 years; sex ratio, 1) were recruited according to the following criteria: (1) a history of either familial or personal colonic neoplasia or (2) alarm symptoms after the age of 60 years. After randomization, an SC was performed in 100 patients (resolution, < or = 410,000 pixels) and a HRC in 103 patients (Fujinon EC485ZW, 850,000 pixels). In the HRC group, each colonic segment was examined before and after spraying with indigo carmine 0.4%. RESULTS Two hundred seventy-six polyps were detected in 198 patients. One hundred sixty of them were hyperplastic polyps, 116 were adenomas, and 2 were carcinomas. The numbers of hyperplastic polyps and purely flat adenomas were significantly higher in the HRC group than in the SC group (1.1 +/- 1.6 vs 0.5 +/- 1.4 and 0.22 +/- 0.68 vs 0.07 +/- 0.29, respectively; P = .01 and P = .04), but there was no significant difference in the total number of adenomas per patient (primary end point) detected between the HRC and the SC groups (0.6 +/- 1.0 vs 0.5 +/- 0.9, respectively). CONCLUSIONS Although HRC improves detection of purely flat adenomas and hyperplastic polyps, the overall detection of colonic adenomas in a population at increased risk of neoplasia is not significantly improved. These findings do not support the routine use of HRC in clinical practice.
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Affiliation(s)
- Marc Le Rhun
- Digestive Diseases Institute, University Hospital Hôtel-Dieu, Nantes, France
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Do 40% of patients resected for barrett esophagus with high-grade dysplasia have unsuspected adenocarcinoma? Arch Pathol Lab Med 2005; 129:177-80. [PMID: 15679415 DOI: 10.5858/2005-129-177-doprfb] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Results of studies conducted in the last 2 decades suggest that the detection of high-grade dysplasia in patients with Barrett esophagus is the harbinger of a synchronous adenocarcinoma, which remains undetected even by rigorous biopsy protocols but is discovered during resection of the esophagus. The reported prevalence of synchronous carcinomas ranges from 0% to 75%. Other researchers maintain that appropriate surveillance programs can be used to detect carcinomas at a curable stage and to prevent unnecessary esophagectomies. Both logistical difficulties and potential methodological pitfalls have plagued many studies designed to investigate this issue. A large multicenter study that would stratify participants for hitherto unexplored variables (eg, age, gender, and ethnic background) may be required before the 40% occult cancer prevalence can be either confirmed or refuted. However, the large scale needed for such a study to provide reliable data and new developments in endoscopic imaging (eg, magnification endoscopy and optical coherence tomography) and endoscopic therapy (eg, mucosectomy) are likely to make such a study both ethically unacceptable and logistically and financially unfeasible. Future research should utilize the combination of new endoscopic technologies with the continuing search for validated biomarkers that help predict the biological behavior of Barrett epithelium in individual patients, with a particular focus on the possible development of preneoplastic and neoplastic lesions. Pathologists who chose to shift their focus from the traditional morphological investigation of dysplasia to the search for usable biomarkers can position themselves at the center of innovative research projects that could radically modify the management of patients with Barrett esophagus.
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Westerterp M, Koppert LB, Buskens CJ, Tilanus HW, ten Kate FJW, Bergman JJHGM, Siersema PD, van Dekken H, van Lanschot JJB. Outcome of surgical treatment for early adenocarcinoma of the esophagus or gastro-esophageal junction. Virchows Arch 2005; 446:497-504. [PMID: 15838647 DOI: 10.1007/s00428-005-1243-1] [Citation(s) in RCA: 221] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Accepted: 02/26/2005] [Indexed: 12/13/2022]
Abstract
Adenocarcinoma of the esophagus, or GEJ, has a poor prognosis. Early lesions [i.e. high grade dysplasia (HGD) or T1-carcinoma] are potentially curable. Local endoscopic therapies are promising treatment options for superficial lesions; however, for deeper lesions, surgical resection is considered to be the treatment of choice. To contribute to therapeutic decision-making, we retrospectively analysed the outcome of transhiatal esophagectomy in 120 patients with pathologically proven HGD (n=13) or T1-adenocarcinoma (n=107) of the distal esophagus or gastro-esophageal junction (GEJ). Tumors were subdivided into six different depths of invasion ('T1-mucosal' m1-m3, 'T1-submucosal' sm1-sm3), and the frequency of lymphatic dissemination and time to locoregional and/or distant recurrence were analysed. Only one of the 79 T1m1-3/sm1 tumors (1%) showed lymph node metastases as compared with 18 out of 41 T1sm2-3 tumors (44%). There was a significant difference in recurrence-free period between T1m1-m3/sm1 versus T1sm2-sm3 tumor patients (P log rank <0.0001), with 5-year recurrence-free percentages of 97% and 57%, respectively. In multivariate analysis including age, gender, tumor differentiation grade, N-stage and depth of invasion, only N-stage was an independent prognostic factor for recurrence-free period (hazard rate=5.9, 95% CI 1.7-20.7). However, if N-stage was excluded from analysis, only depth of invasion (T1sm2-3 versus T1m1-m3/sm1) was an independent prognostic factor for recurrence-free period (hazard rate=7.5, 95% CI 2.0-27.7). These data indicate that T1m1-m3/sm1 adenocarcinomas of esophagus or GEJ show a very low risk of lymphatic dissemination and are therefore eligible for local endoscopic therapy. After transhiatal surgical resection, almost half of the patients with T1sm2-sm3 lesions develop recurrent disease within 5 years, and therefore need additional therapy to improve survival.
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Affiliation(s)
- Marinke Westerterp
- Department of Surgery, Academic Medical Center at the University of Amsterdam, Amsterdam, The Netherlands
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