# Successful Transurethral Resection of Recurrent Tumor in an Isolated Bladder Diverticulum Under Transrectal Ultrasound Guidance

## TL;DR

A rare bladder tumor in an isolated diverticulum was successfully removed using transrectal ultrasound guidance.

## Contribution

Demonstrates the effectiveness of transrectal ultrasound guidance for treating tumors in isolated bladder diverticula.

## Key findings

- Transrectal ultrasound guidance enabled successful tumor resection in an isolated bladder diverticulum.
- The method proved useful for treating tumors in anatomically challenging locations.

## Abstract

An isolated bladder diverticulum is a condition where the diverticulum is no longer connected to the bladder lumen. Bladder tumors in isolated bladder diverticula are extremely rare, and treatment methods have not yet been established.

A 73‐year‐old man who had undergone transurethral resection of a bladder tumor for a papillary tumor near the left ureteral orifice presented with a recurrent tumor within the bladder diverticulum, prompting repeat transurethral resection of a bladder tumor and fulguration of the diverticulum. Although the diverticulum reduced in size, it lost its connection to the bladder lumen. Follow‐up magnetic resonance imaging revealed tumor recurrence within an isolated diverticulum. The tumor was successfully resected via transurethral resection under transrectal ultrasound guidance.

Transrectal ultrasound guidance was useful for transurethral treatment of tumors in isolated bladder diverticulum.