<unk>  <unk> , is a childhood hip disorder initiated by a disruption of blood flow to the head of the femur. Due to the lack of blood flow, the bone dies (osteonecrosis or avascular necrosis) and stops growing. Over time, healing occurs by new blood vessels infiltrating the dead bone and removing the necrotic bone which leads to a loss of bone mass and a weakening of the femoral head. The condition is most commonly found in children between the ages of 4 and 8, but it can occur in children between the ages of 2 and 15. It can produce a permanent deformity of the femoral head, which increases the risk of developing osteoarthritis in adults.<unk>  is a form of osteochondritis which affects only the hip. Bilateral<unk> , which means both hips are affected, should always be investigated to rule out multiple epiphyseal dysplasia.
Legg–Calvé–Perthes disease
Langer–Giedion syndrome
Osgood–Schlatter disease
Avascular necrosis
Iliotibial band syndrome
Löfgren syndrome
Patellar subluxation syndrome
Boxer's fracture