A case of mucosal-associated lymphoid tissue lymphoma of the urachus.

Abstract

Introduction:

Urachus carcinoma is a rare malignancy with an aggressive potential and a poor prognosis, and evidence is limited for its diagnosis and treatment.

Case presentation:

A 75-year-old man underwent fluorodeoxyglucose positron emission tomography/computed tomography for staging prostate cancer, and a mass (standardized uptake value max 9.5) was observed on the outside of the urinary bladder dome. T2-weighted magnetic resonance imaging showed the urachus and a low-intensity tumor, which suggested a malignant tumor. We suspected urachal carcinoma and performed total resection of the urachus and partial cystectomy. Pathological examination revealed mucosa-associated lymphoid tissue lymphoma with cells positive for CD20 and negative for CD3, CD5, and cyclin D1. After the surgery, no recurrence has been observed for more than 2 years.

Conclusion:

We encountered an extremely rare case of mucosa-associated lymphoid tissue lymphoma of the urachus. Surgical resection of the tumor provided an accurate diagnosis and good disease control.

• Authors: Kazuma Tsuboi, Kensuke Bekku, Kohei Haisa, Yuta Kajihara, Takuji Tsugawa, Yosuke Inoue, Tomoko Sako, Wataru Murao, Shin Ebara
• Journal: IJU case reports (IJU Case Rep) Vol. 6 Issue 4 Pg. 253-256 (Jul 2023) ISSN: 2577-171X [Electronic] Australia
• PMID: 37405026 (Publication Type: Case Reports)
• Copyright: © 2023 The Authors. IJU Case Reports published by John Wiley & Sons Australia, Ltd on behalf of Japanese Urological Association.