Iliac crest

The crest of the ilium (or iliac crest) is the superior border of the wing of ilium and the superiolateral margin of the greater pelvis.Muscles connecting the upper extremity to the vertebral column. Left iliac crest is labeled in red.Plan of ossification of the hip bone.The Obliquus internus abdominis.Muscles of the iliac and anterior femoral regions.The relations of the kidneys from behind.Iliac crest labeled at center right.Iliac crest The crest of the ilium (or iliac crest) is the superior border of the wing of ilium and the superiolateral margin of the greater pelvis. The iliac crest stretches posteriorly from the anterior superior iliac spine (ASIS) to the posterior superior iliac spine (PSIS). Behind the ASIS, it divides into an outer and inner lip separated by the intermediate zone. The outer lip bulges laterally into the iliac tubercle. Palpable in its entire length, the crest is convex superiorly but is sinuously curved, being concave inward in front, concave outward behind.