Maisonneuve fracture without deltoid ligament disruption: a rare pattern of injury.

The Maisonneuve fracture is considered by many to be one of the most unstable ankle injuries. We report a rare injury involving fracture of the proximal fibula in association with a posterior malleolar fracture and disruption of the anterior-inferior tibiofibular ligament, without disruption of the deltoid ligament or fracture of the medial malleolus. This report of a diagnostically challenging case highlights the importance of timely clinical and radiographic reassessment of a patient who fails to improve with initial therapy, and describes the clinical and diagnostic imaging findings of an unusual ankle injury. Copyright 2010 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.