Bosworth Fracture Dislocation of the Ankle: a Frequently Missed Injury Grufman V., Holzgang M., Melcher G

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Bosworth fracture dislocation of the ankle: a frequently missed injury Grufman V., Holzgang M., Melcher G. A., Departement of surgery, Hospital of Uster, Switzerland I. Objective We present a case of the rare Bosworth fracture dislocation of the ankle and emphasize the specific clinical and radiological signs to aid its early diagnosis. II. Methods A 26-year old patient sustained a severe external rotation injury to the right ankle in combination with direct trauma. Clinical examination showed an externally rotated foot and tibiotalar dislocation. antero-posterior view lateral view antero-posterior view lateral view a b a b Fig. 2 (a,b): External fixation was applied after successful closed reduction of the tibiotalar joint. Intraoperative radiographs reveal a Fig. 1 (a, b): Weber type-B lateral malleolar fracture with persistent correctly aligned tibiotalar joint, albeit displaying the persistent tibiotalar dislocation. posteromedial displacement of the proximal fibula. Fig. 3 (a: 3D CT-scan reconstruction, oblique view; b: sagittal cut; c: transverse cut): Postoperative CT-scan confirm the persistent postero-medial displacement a b c of the fibula. III. Results IVIV.. ConclusionConclusion Open reduction This rare type of irreducible ankle fracture dislocation, and internal characterized by posteromedial displacement and locking of fixation of the the proximal fibular fragment behind the posterolateral fibula by a lag ridge of the distal tibia, was described by Bosworth 1947.1 screw and To date only about 30 cases have been reported in neutralisation plate. literature. The injury often remains unrecognized and Postoperative permanent disability can occur in case of inappropriate radiographs (Fig. 4 treatment. Treatment of choice is the immediate open a, b) show a reduction and internal fixation to restore anatomy.2 correctly restored anatomy. a b antero-posterior view lateral view References: 1 Bosworth DM. Fracture-dislocation of the ankle with fixed displacement of the fibula behind the tibia. J Bone Joint Surg 1947;29:130-5. 2 Ellanti P, Hammad Y, Grieve PP. Acutely irreducible ankle fracture dislocation: a report of a Bosworth fracture and its management. J Emerg Med. 2013 May;44(5): 349-52. .

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