# Right renal cyst-duodenal fistula: an unusual complication of duodenal ulcer

## TL;DR

An elderly woman presented with a rare complication where a kidney cyst connected to her duodenum due to an ulcer.

## Contribution

The paper reports a rare case of a renal cyst forming a fistula with the duodenum due to an ulcer.

## Key findings

- A 79-year-old female had a right renal cyst with air-fluid level and a duodenal ulcer with fistula.
- The fistula was identified through CT and endoscopy.
- The case highlights an unusual complication of duodenal ulcers.

## Abstract

A 79-year-old female patient was admitted to the hospital with a one-month history of dull pain in the right upper abdomen, accompanied by fever, nausea, vomiting, melena and irritative urinary symptoms. Abdominal contrast-enhanced CT revealed a 5.8 × 5.0 cm cystic lesion in the right kidney with an air-fluid level. Upper gastrointestinal endoscopy detected a duodenal bulb ulcer accompanied by fistula formation.