Computed Tomography-Guided Biopsy of a Ureteral Urothelial Carcinoma Mimicking a Submucosal Bladder Tumor at the Ureterovesical Junction.

ABSTRACT:

Introduction

Intramural ureteral urothelial carcinoma can be difficult to diagnose, especially when presenting without mucosal abnormalities or positive cytology. In such cases, percutaneous biopsy may provide an alternative diagnostic approach.

Case presentation

A 74-year-old man presented with acute renal failure caused by bilateral hydronephrosis. Cystoscopy showed no mucosal abnormality. Retrograde pyeloureterography revealed bilateral distal ureteral strictures, but urine cytology from ureteral catheters was negative. Imaging revealed a submucosal mass on the right dorsal bladder wall. Urothelial carcinoma was diagnosed on a computed tomography-guided percutaneous trans-extraperitoneal and transvesical biopsy. Neoadjuvant chemotherapy was administered and radical cystec

SUBMITTER: Ohtsu A 

PROVIDER: S-EPMC12719012 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature