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©The Author(s) 2025. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Oct 26, 2025; 13(30): 110314
Published online Oct 26, 2025. doi: 10.12998/wjcc.v13.i30.110314
Published online Oct 26, 2025. doi: 10.12998/wjcc.v13.i30.110314
Plasmacytoid urothelial carcinoma of the urinary bladder with colorectal metastasis and mimicking colitis: A case report
Guan-Ying Chen, Hsiang-Lin Tsai, Po-Jung Chen, Yen-Cheng Chen, Jaw Yuan Wang, Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
Chung-Yu Lin, Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
Hsin Ling Yin, Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
Author contributions: Chen GY, Tsai HL, and Wang YJ contributed to manuscript writing and editing, and data collection; Chen PJ and Chen YC contributed to conceptualization; Lin CY and Yin HL contributed to data analysis; all authors have read and approved the final manuscript.
Informed consent statement: The authors certify that they have obtained all appropriate patient consent forms where the patient has given his consent for the images and other clinical information to be reported in the journal while understanding that his name and initials will not be published and all due efforts will be made to conceal his identity, but anonymity cannot be guaranteed.
Conflict-of-interest statement: The authors declare that they have no conflicts of interest with regard to the content of this article.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
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: Hsiang-Lin Tsai, MD, PhD, Professor, Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical Uni
Received: June 4, 2025
Revised: July 9, 2025
Accepted: August 20, 2025
Published online: October 26, 2025
Processing time: 129 Days and 19.6 Hours
Revised: July 9, 2025
Accepted: August 20, 2025
Published online: October 26, 2025
Processing time: 129 Days and 19.6 Hours
Core Tip
Core Tip: This report describes a case of colorectal metastasis in a 65-year-old man with plasmacytoid urothelial carcinoma. The patient had hospitalization with the impression of colitis with ileus initially for the image disclosed diffused bowel distension and long segmental rectosigmoid colonic wall thickening, with clear vesicorectal fat plane. And the colorectal metastasis with an unusal hypothesized pathogenesis was detected and confirmed by endoscopy and pathologic examinations with immunohistochemical staining. This case underscores the uncommon image findings and atypical pathway of me