# Positive outcomes with neoadjuvant chemotherapy in the management of colovesical fistula in cancer: a case report and literature review

## TL;DR

A 62-year-old man with colon cancer and a bladder fistula showed positive results after receiving neoadjuvant chemotherapy before surgery.

## Contribution

The paper introduces the innovative use of neoadjuvant chemotherapy for complex cancerous colovesical fistulas.

## Key findings

- Neoadjuvant chemotherapy significantly reduced the tumor and fistula size.
- Radical surgery was successfully performed with negative margins after chemotherapy.

## Abstract

Colovesical fistula (CVF) is usually developed from colonic diverticulitis, followed by tumor. Traditional surgery is usually completed in one or more stages. For complex cancerous CVF, radical resection is more difficult. We report a 62-year-old male patient diagnosed with sigmoid colon cancer combined with sigmoid vesical fistula. In the course of treatment, in addition to conventional surgery, neoadjuvant chemotherapy (NAC) was innovatively used. The sigmoid tumor and fistula were significantly shrunken. Radical surgery achieved negative margins.