Avulsion Fracture of the Fibular Sesamoid in Association with Dorsal Dislocation of the Metatarsophalangeal Joint of the Hallux

A case of avulsion fracture of the lateral sesamoid is reported in association with dislocation of themetatarsophalangeal joint of the hallux. The radiographic criteria to establish the diagnosis of fracture in sesamoid bones are outlined. Review of the literature reveals only one other reported case associated with a hallux dislocation, and in that case, the radiographic diagnosis was not clearly established.