Extra-articular hip impingement: subspine, iliopsoas, and ischiofemoral impingement

Hip pain can be caused by extra-articular conditions such as subspine impingement, iliopsoas impingement, and ischiofemoral impingement. These syndromes are frequently secondary to underlying pathologies involving the hip joint or lumbar spine. While most cases are managed conservatively through activity modification and physiotherapy, surgical intervention is considered for refractory cases. Imaging, such as computed tomography (CT) scans and magnetic resonance imaging (MRI) is crucial for diagnosing these conditions, as clinical symptoms can be nonspecific. CT scans help identify predisposing factors such as acetabular morphology, femoral version, and acetabular version, while MRI is useful for ruling out other conditions and detecting soft tissue pathology. Although positive treatment outcomes are generally observed, there are variations in results and procedures, and long-term follow-up studies are lacking. Complications of the treatments are a concern, but most reported complications are minor in nature.