Arthroscopic bone grafting of talar bone cyst using posterior ankle arthroscopy.

A subchondral cyst of the talus frequently occurs with an osteochondral lesion of the talar dome. Debridement, curettage, and bone grafting through the articular defect was frequently the recommended treatment in reported studies for a massive cyst. We report a case of a massive cyst of the talar body with a small osteochondral lesion of the talar dome. Our patient was successfully treated by curettage and bone grafting of the cyst using posterior ankle arthroscopy, with minimal disruption of the articular surface of the talar dome.