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Fig. 1C. Lateral radiography of foot used to evaluate subtalar
coalition. Lateral radiograph of 34-year-old woman with normal variant of
talar ridge (for comparison with talar beak, A) shows that talar ridge
(straight arrow) is located at mid neck of talus, at site of
attachment of anterior tibiotalar joint capsule. Note also that middle
subtalar facet is open with short gap (curved arrow) between cortical
outlines of medial talus and sustentaculum tali (i.e., C sign is absent).