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. This article reports an unusual case of an open transcalcaneal talonavicular dislocation associated with the presence of a calcaneal comminuted calcaneal fracture.