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World J Exp Med. Dec 20, 2024; 14(4): 98005
Published online Dec 20, 2024. doi: 10.5493/wjem.v14.i4.98005
Clinicopathological and molecular insights into odontogenic tumors associated with syndromes: A comprehensive review
Lauren Frenzel Schuch, Felipe Martins Silveira, Vanesa Pereira-Prado, Estefania Sicco, Ronell Bologna-Molina, Department of Diagnosis in Pathology and Oral Medicine, Faculty of Dentistry, Universidad de la República, Montevideo 1600, Uruguay
Deepak Pandiar, Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals Chennai, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Chennai 600077, Tamil Nādu, India
Mariana Villarroel-Dorrego, Department of Oral Pathology, Oral Medicine, School of Dentistry, Universidad Central de Venezuela, Venezuela, Caracas 1051, Distrito Capital, Venezuela
ORCID number: Lauren Frenzel Schuch (0000-0002-0993-936X); Felipe Martins Silveira (0000-0001-9834-5194); Vanesa Pereira-Prado (0000-0001-7747-6718); Estefania Sicco (0000-0003-1137-6866); Mariana Villarroel-Dorrego (0000-0002-0596-1527); Ronell Bologna-Molina (0000-0001-9755-4779).
Co-first authors: Lauren Frenzel Schuch and Ronell Bologna-Molina.
Author contributions: Schuch LF and Bologna-Molina R designed and performed research, and wrote the paper; Silveira FM, Pereira-Prado V, Sicco E, and Pandiar D revised the article; Villarroel-Dorrego M contributed with the representative cases.
Conflict-of-interest statement: All the authors declare that they have no conflict of interest.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Ronell Bologna-Molina, DDS, MSc, PhD, Professor, Molecular Pathology Area, Faculty of Dentistry, University of the Republic, Montevideo 11600, Uruguay. ronellbologna@hotmail.com
Received: June 14, 2024
Revised: August 19, 2024
Accepted: August 26, 2024
Published online: December 20, 2024
Processing time: 138 Days and 10.6 Hours

Abstract

The association between genetic syndromes and odontogenic tumors encompasses several entities, reflecting the intricate interplay between genetic factors and the development of these lesions. The present study aimed to comprehensively investigate the associations between genetic syndromes and odontogenic tumors. We delineated the diverse spectrum of syndromic connections, including key syndromes such as Gardner syndrome, Gorlin syndrome, Schimmelpenning syndrome, and others. Our findings underscore the clinical significance of recognizing odontogenic tumors associated with genetic syndromes as diagnostic indicators for early intervention. We advocate for multidisciplinary collaboration among clinicians, geneticists, and researchers to deepen our understanding of the underlying mechanisms driving these syndromic associations. In light of this, our study contributes to the growing body of knowledge in dentistry and medical genetics, offering insights that may inform clinical practice and enhance patient care for individuals affected by genetic syndromes and odontogenic tumors.

Key Words: Genetic syndrome; Odontogenic tumors; Head and neck tumors; Misdiagnosis; Genetic mutations

Core Tip: It is important for the health professional to know that some odontogenic tumors have a close relationship with some genetic syndromes. Knowledge of this relationship can help a correct diagnosis and comprehensive treatment of the patient. Thus, the aim of the present review was to comprehensively investigate the associations between genetic syndromes and odontogenic tumors.



INTRODUCTION

Odontogenic tumors (OT) represent a heterogeneous group of lesions, ranging from non-neoplastic tissue malformations (i.e., hamartomas) to tumors with varying degrees of malignancy and clinical implications. Although considered uncommon, they account for approximately 1% of all oral diagnoses[1,2]. This prevalence can vary according to geographic region, with higher incidence rates reported in countries located in Asia and Africa[3,4]. The origin of OTs is attributed to the proliferation of remnants of the soft and hard tissues that give rise to teeth; however, the exact pathogenesis of these tumors remains unknown[5].

Some cases of OTs associated with syndromes have been observed[6]. Although syndromes often do not directly relate to neoplastic development, their occurrence may indicate a relationship between genetic factors and the pathogenesis of OTs, thereby contributing to a more comprehensive understanding of these entities in the realm of oral pathology. Accordingly, the aim of the present review was to provide insights into the association or concurrent lesions of OT and genetic syndromes based on clinicopathological and molecular aspects.

GENETIC SYNDROMES AND ODONTOGENIC TUMORS

Hereditary aspects are associated with some head and neck tumors[7]. OTs can manifest in association with various syndromes (Table 1), predisposing individuals to the development of multiple tumors concurrently[8-10].

Table 1 Summarize findings of syndromic conditions and odontogenic tumors.
Odontogenic tumor
Syndrome
Genetic alteration
General clinical condition
OdontomaGardner syndromeMutations in the APC geneMultiple colorectal polyps and various types of tumors, both benign and malignant
Otodental syndromeNot yet established (chromosome 11q13 deletion syndrome)Globodontia, sensorineural high-frequency hearing loss and ocular coloboma
Adenomatoid odontogenic tumorSchimmelpenning syndromePostzygotic mutations in RAS genesOne or several nevus sebaceous with abnormalities of ocular, cardiac, skeletal, and nervous systems
Attenuated familial adenomatosis polyposisMutations in the APC gene, with less common occurrences linked to mutations in the MUTYH geneHundreds or thousands of adenomatous polyps in the large bowel
AmeloblastomaGardner syndromeMutations in the APC geneMultiple colorectal polyps and various types of tumors, both benign and malignant
Gorlin syndromeMutations in the patched (PTCH) geneNumerous basal cell carcinomas and accompanying skeletal, ophthalmological, and neurological abnormalities
Schimmelpenning syndromePostzygotic mutations in RAS genesOne or several nevus sebaceous with abnormalities of ocular, cardiac, skeletal, and nervous systems
Simpson-Golabi-Behmel syndromeMutations in a semi-dominant X-linked gene encoding Glypican 3 Pre- and postnatal overgrowth, distinctive facial anomalies, and abnormalities affecting internal organs, the skeleton, and occasionally, varying degrees of intellectual disability
Williams syndromeDeletion of genes on chromosome 7q11.23Developmental delay, intellectual disability, a specific cognitive profile, unique personality characteristics, cardiovascular disease, connective tissue abnormalities, growth deficiency, endocrine abnormalities, and distinctive facies
Odontogenic myxomaGardner syndromeMutations in the APC geneMultiple colorectal polyps and various types of tumors, both benign and malignant
Gardner Syndrome (Familial Adenomatous Polyposis)

Gardner syndrome, a distinct subtype of familial adenomatous polyposis, is characterized by mutations in the Adenomatous polyposis coli (APC) gene[11]. The genetic link between Gardner syndrome and the APC gene, located on chromosome 5, specifically within band 5q21, was identified in research studies[12-14]. The APC gene functions as a tumor suppressor, producing a protein that regulates cell growth and ensures proper cell cycle timing[15]. In Gardner syndrome, mutations in the APC gene result in uncontrolled cell growth. Additionally, Gardner syndrome involves other genetic anomalies, including loss of DNA methylation, mutations in the RAS gene on chromosome 12, deletion of the DCC gene on chromosome 18, and mutations in the TP53 gene on chromosome 17.

Due to the genetic heterogeneity of Gardner syndrome, there can be diverse phenotypic expressions; however, the three primary features are multiple gastrointestinal polyps, osteomas, and soft tissue tumors[16]. This syndrome holds more historical than clinical significance today, as these extraintestinal growths are more closely associated with specific mutation locations in the APC gene rather than with familial patterns.

In terms of oral manifestations, individuals may present with osteomas, supernumerary teeth, impacted teeth, odontomas, and osteomyelitis[7,17]. Concerning OTs, several cases of compound odontomas located in the anterior maxilla or complex odontomas in the posterior mandible or anterior maxilla have been described in the literature[18-21]. Additionally, in 2018, Salti and coauthors[22] published a case involving a large odontogenic myxoma in a patient with Gardner syndrome, who also presented with multiple osteomas and a compound odontoma. Figure 1 illustrates a case of Gardner syndrome in a patient with multiple osteomas and an odontoma.

Figure 1
Figure 1 Gardner syndrome in a 22-years-female patient. A and B: Three-dimensional reconstruction images show multiple variable sized osteomas in craniofacial bones; C: Panoramic radiograph shows radiopacity in the right posterior region of the mandible diagnostic as odontoma; D: Haematoxylin and eosin staining section of the odontoma characterized by the presence of dentinal tubules, odontoblasts, and dental pulp.

Interestingly, Preuss et al[23] conducted a systematic review addressing the prevalence of oral lesions associated with Gardner syndrome. Their investigation revealed that the syndrome could present with lesions localized in the proximity of the jawbones. Notably, unicystic ameloblastoma emerged as the most frequently reported lesion, documented in three cases.

Gorlin syndrome

Gorlin syndrome is a hereditary cancer syndrome inherited in an autosomal dominant manner[7]. This condition is caused by mutations in the patched gene, which encodes a transmembrane receptor responsible for recognizing sonic hedgehog signaling proteins[24,25]. The syndrome is characterized by the presence of numerous basal cell carcinomas, along with accompanying skeletal, ophthalmological, and neurological abnormalities[26]. A small proportion of patients may present with additional features such as hypertelorism, macrocephaly, and cleft lip and/or palate during childhood, along with desmoplastic medulloblastoma. Furthermore, ovarian neoplasms, cardiac fibromas, mesenteric keratocysts, rhabdomyosarcomas, and meningiomas may also be observed in some cases[7].

The diagnostic criteria for Gorlin syndrome have evolved over time. Initially proposed by Evans et al[24] in 1993, the criteria were modified by Kimonis et al[27] in 1997 and later revised by Bree et al[28] in 2011. A diagnosis can be established based on one of the following: (1) One major criterion and genetic confirmation; (2) Two major criteria, or (3) One major criterion and two minor criteria. Specific criteria typically include the presence of multiple basal cell carcinomas, jaw keratocysts, and various skeletal, ophthalmological, and neurological abnormalities. It is important to highlight that a thorough medical and family history, along with a physical examination - including an assessment for dysmorphic features, skeletal abnormalities, and skin abnormalities - is essential in suspected cases of the syndrome[29].

In the gnathic bones, Gorlin syndrome is strongly associated with odontogenic keratocysts (OKCs)[30]. However, cases reporting individuals with Gorlin syndrome and ameloblastomas have been published in the literature, underscoring the diverse spectrum of syndromic associations, including those with OTs, and the potential for multifocal manifestations in affected individuals[31-33]. A systematic review by Atarbashi-Moghadam et al[6] summarizing syndromic conditions and ameloblastomas identified six cases of ameloblastoma associated with Gorlin syndrome. Interestingly, these cases demonstrated a female predilection and a tendency for maxillary involvement.

Careful clinical evaluation and genetic testing are essential to confirm the diagnosis and guide management strategies. Early intervention is crucial in preventing complications and improving patient outcomes. Comprehensive patient care often requires a multidisciplinary approach, involving dermatologists, geneticists, dentists, and other specialists to monitor and treat the diverse manifestations of this syndrome[34,35].

Schimmelpenning syndrome (Epidermal nevus syndrome)

Schimmelpenning syndrome, also known as epidermal nevus syndrome, is a rare congenital disorder characterized by the presence of epidermal nevi-patches of abnormal skin that typically appear as raised, warty, or thickened areas. These are often associated with cerebral, ocular, or skeletal defects[36,37]. Postzygotic mutations in RAS genes have been linked to the development and progression of this disorder[38].

In individuals with Schimmelpenning syndrome, abnormalities in the development of the jaws may occur, primarily presenting as multiple adenomatoid odontogenic tumors (AOT)[10]. A systematic review conducted by Neumann et al[39] identified synchronous OTs in two cases diagnosed with Schimmelpenning syndrome[40,41]. These cases presented with multiple odontomas and an AOT[40], with one case also exhibiting synchronous squamous OT[41].

Otodental syndrome

Otodental syndrome, also known as otodental dysplasia, features a distinctive dental condition called globodontia, often accompanied by sensorineural high-frequency hearing loss and ocular coloboma[42]. Although the specific gene associated with this syndrome remains incompletely elucidated, studies have indicated a deletion on chromosome 11q13[43].

Interestingly, the dental characteristics alone can be definitive for diagnosis. The most consistent anatomical feature is the abnormal morphology of certain teeth[44]. This condition is marked by distinctive tooth fusion features, including abnormal bulbous enlargement of the crown, which appears spherical with poorly defined grooves[45]. Additionally, molars often exhibit taurodontism, characterized by an inverted crown-to-body ratio. There are also frequent alterations in the roots and pulp canals, making endodontic treatment unpredictable[45,46]. Other dental abnormalities associated with otodental syndrome include congenitally missing teeth and enamel hypoplasia[46]. Although few cases have been described, individuals with this syndrome may also exhibit a propensity for multiple odontomas[44,45,47].

Differential diagnoses for otodental syndrome include autosomal recessive sensorineural hearing impairment with dizziness and hypodontia, bilateral sensorineural hearing loss with multiple anterior dens invaginatus, and double dens invaginatus with developmental delay, progressive sensorineural hearing loss, and multituberculated mandibular incisors. For accurate diagnosis and management of the syndrome, a thorough medical, dental, and family history is crucial. An interdisciplinary approach is recommended.

Simpson-Golabi-Behmel syndrome

Simpson-Golabi-Behmel syndrome (SGBS) is a rare condition characterized by overgrowth and multiple congenital anomalies[48,49]. It results from mutations in a semi-dominant X-linked gene responsible for encoding Glypican 3 (GPC3). Information regarding the clinical and oral presentations of SGBS is limited in the literature. To the best of our knowledge, only one case of this syndrome associated with an OT has been reported[49]. The case involved a 16-year-old male who presented with multiple jaw lesions, including an OKC, ameloblastoma, lateral periodontal cyst, dentigerous cyst, and mucous retention cyst, affecting both the mandible and maxilla.

Williams syndrome

Williams syndrome results from the deletion of genes on chromosome 7q11.23, specifically involving the elastin gene. Since the initial description of the syndrome, understanding of the phenotype's complexity and its evolving characteristics has significantly advanced[50]. This includes insights into the genetic underpinnings, mechanisms driving specific phenotypes, and the benefits of various interventions. However, many questions remain unresolved, which limits the capacity to optimize care and enhance patient outcomes.

The syndrome is characterized as a multisystemic disorder, with diagnosis typically guided by the presence of indicative signs and/or symptoms[50]. Notable signs include supravalvular aortic stenosis, facial dysmorphisms, dental anomalies, neurodevelopmental delays, learning disabilities, and an excessively sociable demeanor[51]. The occurrence of OTs is exceedingly rare, with only one case of ameloblastoma reported thus far[52]. In this case, the authors suggest that further molecular and clinical studies are necessary to establish a definitive association between the syndrome and tumor development.

Attenuated familial adenomatous polyposis

Familial adenomatous polyposis (FAP) is a genetic disorder characterized by the development of at least 100 adenomas in the large bowel and various associated manifestations. It is inherited in an autosomal dominant manner and primarily arises from mutations in the APC gene, with less common occurrences linked to mutations in the MUTYH gene. A milder form, known as attenuated FAP, is characterized by the presence of fewer than 100 adenomas in the large bowel, distinguishing it from classical FAP. To date, only one case of an OT (specifically, an AOT) has been described in the literature in association with this syndrome[53].

CONCLUSION

This manuscript provides a comprehensive exploration of the intricate relationship between genetic syndromes and OTs. Our findings underscore the importance of recognizing the oral and maxillofacial manifestations associated with genetic syndromes, as these can serve as diagnostic clues for early detection and intervention. In this context, a thorough clinical examination is crucial. This should include a detailed patient history, consideration of underlying conditions, and relevant imaging tests. Additionally, understanding the associations between OTs and genetic syndromes helps clinicians identify patterns of presentation and anticipate potential complications or comorbidities. This knowledge can guide diagnostic workup, treatment planning, and long-term management strategies for affected individuals. Furthermore, it is important to note that while cases in the literature report OTs occurring in syndromic patients, the syndrome may not necessarily be associated with the etiopathogenesis of the neoplasm.

A significant aspect highlighted is the impact of missed diagnoses of genetic syndromes. Delayed or inaccurate identification can lead to suboptimal management and potentially worsen patient outcomes. For example, in Gardner syndrome, a delayed diagnosis may result in the progression of colorectal polyps to cancer and the development of jawbone lesions, which can lead to facial asymmetry, discomfort, and an increased risk of cancer. In the case of Gorlin syndrome, delays can lead to the progression of jawbone lesions and skin cancers, resulting in severe deformities, chronic pain, and more complex surgical needs.

We also emphasize the importance of incorporating genetic testing into clinical practice when a syndromic condition is suspected. Comprehensive genetic evaluations can not only confirm diagnoses but also provide valuable insights into the hereditary nature of these syndromes. Finally, managing OTs in syndromic patients requires a collaborative approach, involving researchers with expertise across the diverse conditions and genetic factors associated with each syndrome. This approach should consider both the specific characteristics of the tumor and the syndromic condition, aiming to provide optimal care, minimize complications, and enhance the overall quality of life for the patient.

Due to the nature of the study design employed, several limitations are evident. Firstly, the lack of a systematic search method meant that some relevant studies could not be included. Secondly, some case reports lacked the comprehensive details necessary to fully understand the syndrome and its association with OTs. Finally, the findings may not be universally applicable across all healthcare settings or populations due to variations in clinical practices and patient demographics.

Footnotes

Provenance and peer review: Invited article; Externally peer reviewed.

Peer-review model: Single blind

Specialty type: Dentistry, oral surgery and medicine

Country of origin: Uruguay

Peer-review report’s classification

Scientific Quality: Grade C

Novelty: Grade C

Creativity or Innovation: Grade B

Scientific Significance: Grade C

P-Reviewer: Sharma G S-Editor: Liu JH L-Editor: A P-Editor: Wang WB

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