L egg- Calvè- Perthes综合征是一种小儿髋部异常 ,也称股骨头缺血性坏死、股骨头无菌性坏死等。本病不同于成人的股骨头缺血性坏死 ,属自愈性疾病。其病因仍未完全清楚 ,是小儿骨科领域中尚待解决的难题之一。1　流行病学与病因L egg- Calvè- Perthes综合征多见于 4～ 8岁儿 L egg- Calvè- Perthes syndrome is a pediatric hip abnormalities, also known as avascular necrosis of the femoral head, aseptic necrosis of the femoral head and so on. The disease is different from adult femoral head ischemic necrosis, a self-healing disease. Its etiology is still not fully understood and is one of the outstanding problems in pediatric orthopedics. 1 epidemiology and etiology L egg- Calv Perthes syndrome more common in children aged 4 to 8 years