Hip pain: differential diagnosis.

This review discusses the many etiologies of hip pain and how to clinically evaluate. Both primary hip disorders and conditions that refer pain to the hip are included in the differential diagnosis. The key components to a history are reviewed with clinically relevant examples. A comprehensive physical exam is described that includes disease and injury-specific tests. Imaging studies and diagnostic tests available are outlined. Conditions of bursitis, snapping hip syndromes, myofascial pain, fibromyalgia, arthropathies, fractures, neurogenic pain, metabolic diseases, and neoplastic disorders will be discussed.