Atraumatic avascular necrosis of an index sesamoid.

Avascular necrosis of an index sesamoid is our topic. In literature we found a lot of papers published about Hallux and the thumb sesamoid. There were only few articles concerning index sesamoid pathology. But in contrast to these, there's no evidence for trauma, nor arthritis in the personal history of the case discussed. This pathology is rare. Diagnosis is difficult. Treatment by sesamoid resection was successful.