# Stenosing Tenosynovitis Following Ankle Fracture Causing Progressive Acquired Tibialis Posterior Dysfunction: A Case Report

## TL;DR

A rare case of ankle tendon dysfunction after a fracture is reported, with successful treatment through surgery.

## Contribution

This case report highlights a rare cause of adult-acquired flat foot following ankle fracture surgery.

## Key findings

- Stenosing tenosynovitis caused tibialis posterior dysfunction after ankle fracture surgery.
- Surgical excision and tendon distalization improved functional outcomes.
- Osseous bone formation was observed in the affected ankle.

## Abstract

Stenosing tenosynovitis of the ankle with osseous bone formation following an open reduction and internal fixation of the ankle is a rare clinical condition. We report a case of adult-acquired flat foot following an open reduction and internal fixation of a bi-malleolar fracture due to tibialis posterior tendon dysfunction caused by stenosing tenosynovitis. This was managed by open excision of the bony tunnel and debridement, along with calcaneal osteotomy and distalization of the tendon, resulting in good functional outcomes.