Successful nonoperative treatment of a closed posteromedial ankle dislocation without associated fractures – a case report

Abstract

Introduction: Pure ankle dislocations occurring in the absence of malleolus fractures are extremely rare injuries. These injuries often present with high-energy trauma and ligamentous injury. Comprehensive research is not available due to the rarity of the injury. However, recent literature has supported treatment by nonoperative means. This case report aims to discuss a similar case and offer insight into the prognosis of such injuries. Case presentation: A previously healthy 26-year-old male was diagnosed with a closed posteromedial ankle dislocation without associated fractures. Reduction was performed under procedural sedation and confirmed with postreduction radiographs. The patient was immobilized and scheduled for serial follow-up in the outpatient department. Weight bearing was gradually introduced at 6 weeks along with physiotherapy. The American Orthopedic Foot and Ankle Score was 90 and 100 at 6 months and 1 year follow-up, respectively. Return to sports was possible at 1 year postinjury. Range of motion was normal apart from a 5–8° ankle dorsiflexion deficit. Radiographs, computed tomography, and MRI were unremarkable with longer term follow-up. Conclusion: Patients who sustain pure ankle dislocations with an intact distal tibiofibular syndesmosis can expect favorable outcomes with immobilization, splinting, and gradual rehabilitation, as evident by the high American Orthopedic Foot and Ankle Score and the time to return to sports. This case report serves to provide prognostic information and anticipate outcomes in patients with similar injuries.