# Urachal Villous Adenoma Coexistent With Urachal Carcinoma: A Case Report

## TL;DR

A rare case of a bladder tumor combining a urachal villous adenoma and urachal carcinoma is reported, highlighting the need for aggressive treatment.

## Contribution

This case report documents the rare coexistence of urachal villous adenoma and urachal carcinoma in a single patient.

## Key findings

- A urachal tumor in an 86-year-old woman was diagnosed as a villous adenoma but revealed mucinous adenocarcinoma upon surgical examination.
- The patient remained recurrence-free for 8 months after partial cystectomy and umbilical ligament excision.
- The case emphasizes the potential malignancy of urachal villous adenomas and the need for aggressive management.

## Abstract

Urinary tract villous adenomas are uncommon, urachal villous adenomas being especially rare. While their malignant potential remains uncertain, villous adenomas may have malignant components. Here, we present a case of the coexistence of a urachal villous adenoma and urachal carcinoma.

We report the case of an 86‐year‐old woman with a urachal tumor of the bladder wall. A biopsy yielded a diagnosis of villous adenoma. Because of the possibility of coexisting malignancy, we performed a partial cystectomy, including excision of the umbilical ligament. Examination of the operative specimen revealed mucinous adenocarcinoma. She has remained recurrence‐free for 8 months postoperatively.

We here report the coexistence of a villous adenoma and mucinous adenocarcinoma of the urachus. Because urachal villous adenomas can have malignant components, they require aggressive treatment. This rare combination should be kept in mind.