A thorough knowledge of the ankle anatomy is absolutely necessary for diagnosis and adequate treatment of ankle injury. The ankle is among the most prevalent joints injured in sports, the ankle sprain being the most common ankle lesion. The ankle joint is formed by the distal tibia and fi bula, and the superior talus. Two ligamentous complexes join the bones that form the ankle: the ligaments of the tibiofi bular syndesmosis (anteroinferior tibiofi bular, posteroinferior tibiofi bular, and the interosseous tibiofi bular ligament) and the lateral (anterior talofi bular, calcaneofi bular, and the posterior talofi bular ligament) and medial (superfi cial and deep