1 — Pubic symphysis; 2 — Pubic tubercle; 3 — Obturator canal; 4 — Obturator internus; 5 — Greater sciatic foramen; 6 — Anterior superior iliac spine; 7 — Iliac crest; 8 — Posterior superior iliac spine; 9 — Piriformis; 10 — Sacrum [sacral vertebrae SI-SV]; 11 — Sacrospinous ligament; 12 — Coccyx [coccygeal vertebrae CoI-CoIV]; 13 — Lesser sciatic foramen; 14 — Sacrotuberous ligament; 15 — Posterior sacral foramina; 16 — Posterior sacro-iliac ligament; 17 — lliofemoral ligament; 18 — Ischiofemoral ligament; 19 — Greater trochanter; 20 — Obturator inter-
nus; Tendon; 21 — Lesser trochanter
