Impingement Exostoses of the Talus and Fibula Secondary to an Inversion Sprain: A case report

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Abstract
Impingement exostoses of the talus and fibula following an inversion sprain is an uncommon sequela to the initial injury. Although a high frequency of symptomatic tibial and talar impingement exostoses have been reported, changes on the lateral side of the ankle are more subtle with significant roentgenographic findings rarely seen. The authors present a rare case of impingement exostoses involving both the talus and fibula simultaneously. Arthroscopy visualized the tibiotalar and talomalleolar articulations. It revealed opposing exostoses of the talus and fibula, necessitating surgical resection. Arthroscopy is recommended for difficult diagnostic problems of the ankle and an awareness of the condition of post-traumatic impingement exostoses of the talus and fibula.

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