Proximal tibiofibular joint dislocation associated with an ipsilateral lateral malleolar fracture: A rare case report

Proximal tibiofibular joint (PTFJ) dislocation is an uncommon injury that is frequently overlooked, particularly when associated with more evident lesions of the lower limb. We report a rare case of PTFJ dislocation associated with an ipsilateral lateral malleolar fracture following a road traffic accident in a 35-year-old female patient. Clinically, the patient presented with knee and ankle pain, inability to bear weight, and subtle prominence of the fibular head. Radiographic assessment revealed an anterolateral dislocation of the proximal tibiofibular joint combined with a supratubercular fracture of the lateral malleolus. Surgical management was performed, consisting of open reduction and internal fixation of the lateral malleolus using a plate and screws, followed by anatomical reduction and stabilization of the PTFJ with a transarticular screw. Postoperative evolution was uneventful, and progressive rehabilitation was initiated after six weeks of immobilization. At three months follow-up, the patient regained full weight bearing with satisfactory knee and ankle range of motion and no evidence of instability or neurological deficit. This case highlights the importance of a systematic clinical and radiological evaluation of the entire tibiofibular axis in patients presenting with ankle trauma. Early diagnosis and appropriate surgical management are essential to prevent chronic instability and ensure favorable functional outcomes.