Pure Talonavicular Dislocation: A Case Report

Introduction: Talonavicular dislocation is a rare injury that usually occurs following high-energy trauma. The mechanism of injury is a force of abduction or adduction applied to the forefoot. In this article, we present a rare case of pure medial talonavicular dislocation  following high-energy trauma.

Presentation of case: We report a case of pure talonavicular dislocation  in a 54-year-old male. He presented at the emergency department with a history of twisting injury to his left foot. Physical examination revealed an obvious deformity of his foot associated with tenderness. No neurological deficit was present. Radiograph showed pure medial talonavicular dislocation. Closed reduction was done followed by six weeks in a cast. The patient was followed up for six months and no complications were reported. Discussion: Talonavicular dislocation is commonly associated with ligamentous disruption and midfoot fractures. Most studies reported this type of dislocation in association with a fracture of the navicular, cuboid, talus, calcaneus or metatarsal bones as a result of high-energy trauma. 

Conclusion: Since this type of dislocation is rare, it is important to recognize it early to avoid complications such as painful equinovarus deformity. Early reduction and immobilization are the ideal treatment for this injury.