Abstract
Introduction:Peroneal longus dislocation is an uncommon sports injury and commonly misdiagnosed. Imaging measure includes plain radiography, ultrasonography, and MRI examination. Treatment strategies include controversial nonoperative treatment with a significant failure rate and several surgical procedures were reported. We reporting a chronic peroneal longus dislocation case in our hospital.Material and methods:Twenty-two years old male presented with a painful snapping lateral ankle suffered 3-month prior surgery. He played futsal and suddenly he felt popped on his ankle followed by pain and swelling. Dynamic ultrasound examination shows dislocation of peroneal longus tendon and convex shape of the retromalleolar groove. A five-centimeter long incision is made posterior to the lateral malleolus and during exploration we confirmed the ultrasound findings. We perform retromalleolar groove deepening by making bone flap medially, curette the cancellous bone and tamper back the bone flap, followed by superior peroneal retinaculum (SPR) reconstruction to the medial aspect of lateral cortex of the lateral malleolus to provide smooth gliding surface. We immobilize the ankle with a cast for six weeks for soft tissue healing.Result:After six weeks he can perform the almost full range of motion of the ankle without pain. Followed by further physiotherapy to regain full range of motion of the ankle. He returns to sport six months after surgery. Ultrasound examination shows the stability of the peroneal longus tendon.Conclusion:Dynamic ultrasound examination and retromalleolar groove deepening with SPR reconstruction are simple and inexpensive management for peroneal longus dislocation
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