Editorial Commentary: Hip Borderline Dysplasia Patients May Have Acetabular Undercoverage and Larger Labra.

The compensatory labrum needs to considered in patients with mechanical hip pain. It is no longer adequate to broadly characterize patients with femoracetabular impingement as either cam or pincher patients. Effective treatment of the syndrome requires in-depth assessment version, head-neck offset, subspine, and capsule-labral morphology, especially in patients with borderline dysplasia. A larger acetabular labrum is associated with hip dysplasia, and labral length correlates with lateral center-edge angle and acetabular roof obliquity. Symptomatic hips show larger labra. Labral size and acetabular undercoverage are part of the spectrum in patients with borderline dysplasia and evidence of impingement. Quantitative and advanced 3-dimensional imaging is a critical evaluation tool.