# Colorenal Fistula in a Patient With Recurrent Urinary Tract Infections and Urinary Urgency: A Case Report

## TL;DR

A 68-year-old woman with recurring urinary issues was found to have a rare colorenal fistula without prior surgery or cancer.

## Contribution

This case report presents a rare colorenal fistula without a history of surgery, malignancy, or diverticulitis.

## Key findings

- A colorenal fistula was diagnosed in a patient with recurrent urinary tract infections and urinary urgency.
- The fistula was identified via imaging and ureteroscopy, revealing gas in the renal system and contrast in the colon.
- Biopsies and colonoscopy ruled out malignancy as a cause of the fistula.

## Abstract

Colorenal fistula is a rare condition resulting from chronic inflammation, malignancies, diverticulitis, or infection. This case examines a 68-year-old female with a history of urinary urgency, left back pain, and recurrent urinary tract infections. Anteroposterior non-contrast computed tomography scan showed a large stone in the renal pelvis and gas in the collecting system. Left ureteroscopy revealed multiple ureteral polyps. Retrograde pyelogram revealed contrast filling the left colon. Ureteral polyp biopsies were benign, and colonoscopy was negative for malignancy. This case describes the occurrence of a colorenal fistula in a patient with no history of surgery, malignancy, or diverticulitis.