Osteonecrosis of the femoral head: diagnosis and classification systems.

摘要: Osteonecrosis of femoral head is a rare but disabling condition that usually results in progressive collapse and secondary arthritis necessitating total hip arthroplasty if not treated appropriately early stages. However, diagnosis challenging as the onset disease insidious symptoms signs are minimal nonspecific until it becomes advanced. Of several diagnostic modalities, magnetic resonance imaging (MRI) considered method choice with highest sensitivity specificity, while detection potential risk factors very important well. Many investigators have developed different classification systems; however, there still controversy regarding optimal system. Diagnostic methods evolution systems will be reviewed this paper.