# Cannulated Cancellous Screw Fixation for Symptomatic Os Subfibulare: A Case Report

## TL;DR

A 16-year-old girl with a painful os subfibulare was successfully treated with a cannulated cancellous screw, improving her ankle stability and function.

## Contribution

This case report introduces cannulated cancellous screw fixation as a novel surgical approach for treating symptomatic os subfibulare.

## Key findings

- Cannulated cancellous screw fixation resolved symptoms and restored ankle stability in a patient with os subfibulare.
- The procedure led to significant functional improvement in a 16-year-old female patient.
- Further research is needed to evaluate long-term outcomes and refine treatment protocols.

## Abstract

Os subfibulare, a rare accessory ossicle located at the distal fibula, is hypothesized to result from the failure of fusion of a secondary ossification center or chronic avulsion fractures. While often asymptomatic, symptomatic cases associated with pain and ankle instability may require surgical intervention when conservative management fails. This report describes the case of a 16-year-old female who was successfully treated with cannulated cancellous screw fixation, achieving complete symptom resolution, restoring ankle stability, and significant functional improvement. This case highlights the importance of selecting optimal surgical strategies for large fragments to restore joint stability and improve outcomes. Given the short-term follow-up of this study, further research is necessary to evaluate long-term efficacy and refine treatment protocols.