TOPICS: Hip joint, acetabulum, femur, hip flexors, iliacus, iliopsoas, sartorius, tensor fasciae latae, psoas major, hip extensors, gluteus maximus, semitendinosus, semimembranosus, biceps femoris muscles, hip adductors, adductor magnus, adductor brevis, adductor longus, gracilis, pectineus, hip abductors, gluteus medius, gluteus minimus, hip bones, hip muscles, nerve injuries, piriformis, superior gluteal nerve, gluteus medius, gluteus minimus, Trendelenburg sign, gluteus medius lurch, inferior gluteal nerve, hip abduction, hip extension, trochanteric bursitis, developmental dysplasia of the hip, Ortolani test, Barlow test, slipped capital femoral epiphysis (SCFE), Legg-Calve-Perthes disease