Extra-articular extrusion of an osteochondral fragment of the talar dome

Description: Osteochondral fractures of the talus are uncommon. They are classified according to Berndt and Harty, as progressing in severity through four stages. This classification, however, does not address extra-articular extrusion of the osteochondral fragment. We report an osteochondral lesion of the talar dome which presented as an extruded extra-articular fragment in a closed injury of the ankle. This type of lesion may offer a continuation to the four original stages. Clinicians should be aware that this pattern of fracture can occur, and thus allow a more accurate diagnosis and the provision of some aid in the treatment of these injuries.
Extra-articular extrusion of an osteochondral fragment of the talar dome. Herscovici D Jr, Infante AF Jr, Scaduto JM. J Bone Joint Surg Br. 2003 Apr;85(3):431-4.