Snapshot A 9-year-old boy presents to his pediatrician with a limp and hip pain. He denies any inciting trauma or event. On exam, he is noted to have atrophy in his upper thigh, asymmetry in leg lengths, and decreased range of motion in his left hip. Radiograph shows sclerosis in the femoral head. His physician recommends conservative management. Introduction Clinical definition login to view 1 more bullet Epidemiology Demographics login to view 3 more bullets Risk factors login to view 4 more bullets Etiology Unknown but thought to be related to factors that can disrupt bone formation or blood supply to the femoral head, including coagulation abnormalities or trauma Pathogenesis login to view 3 more bullets Associated conditions login to view 4 more bullets Presentation Symptoms login to view 3 more bullets Physical exam login to view 8 more bullets Imaging Radiography login to view 6 more bullets Magnetic resonance imaging login to view 5 more bullets Technetium bone scan login to view 1 more bullet Studies Labs login to view 1 more bullet Making the diagnosis login to view 1 more bullet Differential Sickle cell disease login to view 3 more bullets Slipped capital femoral epiphysis login to view 3 more bullets Treatment Management approach login to view 1 more bullet Conservative login to view 6 more bullets Medical login to view 3 more bullets Operative login to view 6 more bullets Complications Permanent femoral head deformity and limp Osteoarthritis login to view 1 more bullet Prognosis Over half heal without surgical intervention