Dynamic Ischiofemoral Impingement: Case-Based Evidence of Progressive Pathophysiology from Hip Abductor Insufficiency: A Report of Two Cases.

Hip abductor insufficiency may lead to dynamic progressive ischiofemoral impingement. Hemipelvic instability from hip abductor weakness results in a Trendelenburg gait, narrowing the ischiofemoral space and impinging the quadratus femoris muscle. Treatment options for dynamic ischiofemoral impingement potentially can focus on treatment of the underlying cause of the hemipelvic instability, preventing additional ischiofemoral-space narrowing and quadratus femoris damage by minimizing the Trendelenburg gait.