Perthes disease

Perthes disease is a pediatric orthopedic condition in which the blood supply to the head of the femur is temporarily interrupted, resulting in bone necrosis (avascular necrosis). It most commonly affects children between the ages of 4 and 10 and causes hip or knee pain, limping, and restricted hip movement. Treatment depends on the child's age and the severity of the disease and may include observation, physical therapy, orthopedic devices (bracing), or surgery. With appropriate treatment, many children regain satisfactory hip function.