Snapshot A 13-year-old boy presents with pain in his left groin, hip, and thigh. His mother notices a limp when he walks. The patient denies any recent significant trauma to his left lower extremity. On physical exam, his gait is antalgic. With the patient in the supine position, there is external rotation and abduction of the thigh with passive flexion of the hip. A radiograph of the affected hip is performed, which demonstrates inferior displacement of the left epiphysis. Introduction Clinical definition login to view 1 more bullet Etiology Pathogenesis login to view 5 more bullets Associated conditions login to view 6 more bullets Epidemiology Demographics login to view 3 more bullets Risk factors login to view 2 more bullets Presentation Symptoms login to view 2 more bullets Physical exam login to view 6 more bullets Imaging Radiography login to view 9 more bullets Studies Making the diagnosis login to view 1 more bullet Differential Legg-Calve-Perthes disease login to view 3 more bullets Treatment Conservative login to view 3 more bullets Operative login to view 7 more bullets Complications Avascular necrosis of hip Chondrolysis login to view 1 more bullet Osteoarthritis Prognosis May recur even with stabilization