Table 1. Differential diagnosis of hip pain.

Intra-articular causes	Extra-articular causes
Coxarthrosis	Bursitis
Hip dysplasia	Snapping hip
Femoroacetabular impingement	Insertion tendinopathy
Transient ischemic osteoporosis/bone bruise	Para-articular soft-tissue tumor
Chondromatosis	Heterotopic ossification
Osteochondral lesion	Spinal canal stenosis
Infection	Spondylarthrosis/root compression syndrome
Fracture	Iliosacral joint symptoms
Lesion of round ligament	Piriform muscle syndrome
Rheumatoid arthritis	—
Pigmented villonodular synovialitis	—