Irreducible fracture dislocation of the ankle is a rare condition. Multiple cases have been described throughout the literature. Different known etiologies involve the distal fibula, deltoïd ligament and tendons of the posteromedial malleolar region. More specifically, trapping of the Posterior tibialis tendon has been described at several levels from the inside of the ankle joint, through the syndesmosis and in some cases in the fibula tibial interosseous space depending on the energy of trauma. We hereafter propose a case report and a review of previous cases of posterior tibialis tendon dislocation proximally in the interosseous space of the lower leg. The aim of this review is to point out common features and clues for early management in order to avoid overlooking these rare lesions as they may lead to major functional impairment of the ankle joint.

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