# Chondromyxoid Fibroma of Phalanges

## TL;DR

A rare bone tumor called chondromyxoid fibroma was diagnosed in a 47-year-old woman's finger through imaging and histopathology.

## Contribution

The paper presents a new clinical case of chondromyxoid fibroma in an unusual location and emphasizes the importance of histopathology for accurate diagnosis.

## Key findings

- CMF was diagnosed in the left little finger of a 47-year-old female through imaging and histopathology.
- Histopathology revealed a lobulated tumor with spindle to stellate cells in a myxoid and chondroid matrix.
- Complete local excision is recommended to prevent recurrence, as local curettage may lead to tumor regrowth.

## Abstract

Chondromyxoid fibroma (CMF) is a rare, benign metaphyseal bone tumour characterised by a combination of chondroid, myxoid, and fibrous elements. It can affect any bone at any age, with no gender predilection. We report a case of CMF in a 47-year-old female patient who presented with swelling of the left little finger at a tertiary care hospital in Kolkata, India, in 2024. Imaging revealed a lobulated lesion originating from the middle phalanx of the left little finger, extending to involve the base of the distal phalanx. Fine needle aspiration cytology indicated a moderately cellular myxoid lesion. Histopathology, which remains crucial for diagnosis, showed a lobulated tumour with zones of spindle to stellate cells, associated with an abundant myxoid and chondroid matrix in the intercellular spaces. Treatment involves complete local excision with tumour-free margins, as recurrence may occur with local curettage.