# Intramuscular Soft Tissue Giant Cell Tumor of the Forearm: A Case Report

## TL;DR

A 33-year-old woman had a rare benign tumor in her forearm, which was surgically removed and showed no recurrence.

## Contribution

This case report presents a rare occurrence of a giant cell tumor in the forearm's soft tissue.

## Key findings

- The tumor was confirmed as a benign giant cell tumor of soft tissue through histopathology.
- The patient showed no signs of recurrence at the last follow-up.
- The tumor was located intramuscularly beneath the antebrachial fascia.

## Abstract

We report the case of a 33‐year‐old female who presented with a painful, rapidly growing mass on her left dorsal forearm. Physical examination revealed a 2 cm firm, well‐demarcated, non‐erythematous nodule beneath the skin, with an initial diagnosis of lipoma. Upon removal, the mass was found to be intramuscular beneath the antebrachial fascia. The histopathology confirmed a benign giant cell tumor of soft tissue (GCT‐ST). The patient was informed of the potential risk of recurrence, and regular follow‐up was recommended. At the last follow‐up, no clinical evidence of recurrence was noted. This report highlights a rare case of an intramuscular soft tissue GCT at an exceptional location, the forearm.