Illustrations of a case of OCD Talus. References mainly to the radiology literature

Osteochondritis dissecans is an injury to the talus bone of the ankle joint. Because the ankle joint is so small, the amount of force that goes across the joint, with each step, has been estimated to be approximately 5-10 times a person's body weight.As a result of this tremendous force that occurs in the ankle joint, relatively small injuries to the articular surface of the talus often result in chronically painful injuries

Journal of Bone and Joint Surgery, 1959;41:988-1020.
Transchondral Fractures (Osteochondritis Dissecans) of the Talus Albert L. Berndt M.D., M.SC. and Michael Harty F.R.C.S.
Detached osteochondral fragments from the dome of the talus have been described in orthopaedic publications by a variety of confusing terms. A clarification of this conflicting terminology is suggested. We believe that the traumatic etiology of the lesion has been confirmed both clinically and experimentally. The problems of clinical and roentgenographic diagnosis are discussed and illustrated by case histories. Various forms of treatment are evaluated, and the prognosis appraised.