Bilateral isolated tarsal navicular fracture dislocation: a case report.

Fracture-dislocation of the tarsal navicular is rare injury because of strong ligamentous support on both its plantar and dorsal sides. The authors report a case of a twenty-five-year-old man who sustained bilateral isolated tarsal navicular fracture-dislocations, treated by open reduction and internal fixation combined with external fixation. The patient reported no difficulty in activities of daily living, but T1-weighted magnetic resonance imaging showed a low-intensity area in right tarsal navicular, raising suspicion of osteonecrosis when he was last seen two year three months after operation.