Perthes Disease

Perthes Disease, or Legg-Calve-Perthes, results from a temporary disruption in the blood supply to the femoral head. Without adequate blood supply, the bone cells die during a process called "avascular necrosis." The dead bone is resorbed, and new bone grows back. This process occurs in 4 stages, which can take several years. The final shape of the femoral head influences the child’s risk of developing hip joint arthritis.