Femoroacetabular impingement.

Evidence is emerging that subtle morphologic abnormalities around the hip, resulting in femoroacetabular impingement, may be a contributing factor in some instances to osteoarthritis in the young patient. The morphologic abnormalities result in abnormal contact between the femoral neck/head and the acetabular margin, causing tearing of the labrum and avulsion of the underlying cartilage region, continued deterioration, and eventual onset of arthritis. Nonsurgical treatment typically fails to control symptoms. Surgical management involves dislocation of the hip (while preserving the blood supply to the femoral head) and femoroacetabular osteoplasty. Encouraging results have been reported following femoroacetabular osteoplasty and arthroscopic treatment of femoroacetabular impingement.