| Location |
Foot |
| Diagnosis |
Subtalar coalition |
| Discussion |
Lateral radiograph of the foot revealing a classic C sign which is a C-shaped line formed by the medial outline of the talar dome and the inferior outline of the sustentaculum tali. This is a sign of subtalar coalition. It is a reliable indicator of subtalar coalition on the lateral radiograph and represents the bony bridge between the talar dome and the sustentaculum tali.
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| Reference |
Lateur LM, Van Hoe LR, Van Ghillewe KV, Gryspeerdt SS, Baert AL, Dereymaeker GE: Subtalar coalition: diagnosis with the C sign on lateral radiographs of the ankle. Radiology 1994 Dec;193(3):847-51. |
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