Transcalcaneal talonavicular dislocation associated with an open comminuted calcaneal fracture: a case report.

The combination of dorsal dislocation of the navicular from the talus and a comminuted fracture of the calcaneus (transcalcaneal talonavicular dislocation) is an unusual and severe injury. It occurs due to a forced plantarflexion of the talar head through the anterior portion of the calcaneum and is usually associated with a potential for skin and neurovascular compromise. Few cases have been reported in the literature.