# Giant Cell Tumor of Hoffa’s Fat Pad: A Case Report

## TL;DR

A rare case of a benign tumor in a young woman's knee was successfully treated and remained non-recurrent for two years.

## Contribution

This case report highlights the rare occurrence of localized giant cell tumor in Hoffa's fat pad and its successful arthroscopic treatment.

## Key findings

- Localized giant cell tumor in Hoffa's fat pad is extremely rare in the knee joint.
- Arthroscopic resection led to no recurrence over two years of follow-up.
- Non-traumatic knee pain should prompt consideration of this rare condition.

## Abstract

Tenosynovial giant cell tumor (GCT) is a rare, benign disorder involving the joint's synovial lining, tendon sheath or bursa. It can be classified as localized or diffuse based on its pattern and behavior. Localized form is extremely rare in knee joint. We present an unusual case of localized form of GCT in Hoffa's fat pad in a young female, treated with arthroscopic resection and monitored for over two years with no recurrence. Despite its rarity, GCT of Hoffa's fat pad should be considered in cases of non-traumatic knee pain.