# Painful ulnar artery leiomyoma simulating an ulnar artery aneurysm

## TL;DR

A rare benign tumor of the ulnar artery was mistaken for an aneurysm but successfully treated with surgery.

## Contribution

Presentation of a rare case of angioleiomyoma in the ulnar artery with long-term diagnostic challenges.

## Key findings

- The tumor was misdiagnosed as an ulnar artery aneurysm for 20 years.
- Surgical excision and arterial repair resolved the symptoms and confirmed the diagnosis.
- The patient remained asymptomatic and pain-free six months post-surgery.

## Abstract

Angioleiomyomas are rare, benign, smooth muscle tumors that occur predominantly in the lower limbs and infrequently in the upper limbs. We present a case of angioleiomyoma arising from the distal ulnar artery, presenting as a painful lesion with a 20-year history of diagnostic uncertainty. It was preoperatively misdiagnosed as an ulnar artery aneurysm. Surgical excision with primary end-to-end arterial repair was performed. Histopathological examination confirmed features consistent with a leiomyoma arising from the distal ulnar artery wall. The patient became asymptomatic following the surgery and remains pain-free at 6 months of follow-up.