1 — Obturator foramen; 2 — Ischial spine; 3 — Posterior sacral foramina; 4 — Posterior inferior iliac spine; 5 — Posterior superior iliac spine; 6 — Iliac crest; 7 — Sacral canal; 8 — Superior articular process; 9 — Ilium; 10 — Median sacral crest; 11 — Sacral hiatus; 12 — Acetabular margin; 13 — Pubis; 14 — Ischial tuberosity; 15 — Coccyx [coccygeal vertebrae CoI-CoIV] ; 16 — Inferior pubic ramus; 17 — Superior pubic ramus; 18 — Anterior gluteal line; 19 — Posterior gluteal line; 20 — Iliac tuberosity; 21 — Gluteal surface; 22 — Ala of ilium; Wing of ilium;
23 — Greater sciatic notch; 24 — Lesser sciatic notch
