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

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.