Pathophysiology: Legg-Calve-Perthes disease is a childhood condition that affects the hip, where the thighbone (femur) and pelvis meet in a ball-and-socket joint. It occurs when blood supply is temporarily interrupted to the ball part (femoral head) of the hip joint. Without sufficient blood flow, the bone begins to die — so it breaks more easily and heals poorly. Signs & Symptoms: Common symptoms include hip, knee, or groin pain, exacerbated by hip/leg movement, especially internal hip rotation.
Treatment: X-Rays of the hip may suggest and/or verify the diagnosis. X-rays usually demonstrate a flattened, and later fragmented, femoral head. A bone scan or MRI may be useful in making the diagnosis in those cases where x-rays are inconclusive. Usually, plain radiographic changes are delayed 6 weeks or more from clinical onset. So bone scintography and MRI are done for early diagnosis. Treatment is done by removing mechanical pressure from the joint until the disease has run its course.
Statistics:Seventy-two patients with Legg-Calvé-Perthes disease were studied to assess the interference with proximal femoral growth as a result of the disease itself and of surgical treatment. Twenty-five patients were treated nonoperatively, 20 were treated by femoral varus derotation osteotomy, and 27 by innominate osteotomy. All patients were studied clinically for evidence of abductor weakness and leg-length discrepancy.They were also studied roentgenographically for evidence of femoral head deformity and trochanteric overgrowth.