ABSTRACT
Retroversion of the acetabulum is a structural disorder in which the acetabulum opens in a posterolateral direction instead of an anterolateral direction in the sagittal plane. The limitations in range of motion (flexion and internal rotation) conferred by sectorial overcoverage resulting from retroversion may predispose patients to femoroacetabular impingement. If left untreated in a symptomatic patient, femoroacetabular impingement can lead to early hip arthritis. In a symptomatic patient with preserved articular cartilage, treatment of the structural disorder may be warranted to alleviate pain and limit the progression of hip disease. It is helpful to review the clinical diagnosis, radiographic interpretation, and management of acetabular retroversion, including treatment with reverse periacetabular osteotomy.