Arthroscopic Treatment of Subspine (Anterior-Inferior Iliac Spine) Impingement

Hip impingement can be caused by both intra- and extra-articular pathologies and may lead to significant pain and disability. Femoroacetabular impingement may present in 3 forms of intra-articular impingement: cam, pincer, or mixed. Extra-articular impingement is also common yet less recognized, but may also lead to significant functional limitations. In 1 form, the anterior-inferior iliac spine or subspine region may impinge on the femoral neck during motion. Symptoms include limited and painful hip flexion. Physical examination as well as diagnostic injections in the region can help distinguish the cause of pain. Hip arthroscopy has been reported to produce excellent results with correction of the bony deformity in the subspine region and acetabular rim. Here, we outline subspine impingment and describe our preferred surgical technique. (c) 2020 Elsevier Inc. All rights reserved.