Summary
PROJECT SUMMARY Femoroacetabular impingement syndrome (FAIS) is a common cause of hip pain and disability and a known risk factor for hip osteoarthritis (OA). Patients with FAIS present with a loss of sphericity of the femoral head, reduction in femoral-neck offset, and/or prominent acetabular wall. Patient symptoms as well as patterns of soft tissue damage to hip cartilage and labrum (i.e., ‘chondrolabral’) tissues support the clinical theory that hip pathoanatomy creates pathomechanics. Still, the presence of impingement deformities does not reliably predict symptoms, soft tissue damage, or
