Legg-Calvé-Perthes disease (LCPD) is the name given to idiopathic osteonecrosis of the capital femoral epiphysis of the femoral head. The goal of treatment is to avoid severe degenerative arthritis

Sex: Males are affected 4-5 times more often than females.

Age: LCPD most commonly is seen in persons aged 3-12 years

Symptoms usually have been present for weeks because the child often does not complain.

·       Hip or groin pain, which may be referred to the thigh

·       Mild or intermittent pain in anterior thigh or knee

·       Limp

·       Usually no history of trauma

·       Plain x-rays of the hip are extremely useful in establishing the diagnosis.

·       Frog leg views of the affected hip are very helpful.

·       Five radiographic stages can be seen by plain x-ray. In sequence, they are as follows:

·       Cessation of growth at the capital femoral epiphysis; smaller femoral head epiphysis and widening of articular space on affected side

·       Subchondral fracture; linear radiolucency within the femoral head epiphysis

·       Resorption of bone

·       Re-ossification of new bone

·       Healed stage

Catterall staging is as follows:

·       Stage I - Histologic and clinical diagnosis without radiographic findings

·       Stage II - Sclerosis with or without cystic changes with preservation of the contour and surface of femoral head

·       Stage III - Loss of structural integrity of the femoral head

·       Stage IV - Loss of structural integrity of the acetabulum in addition