The
crest of the ilium (or
iliac crest) is the superior border of the
wing of ilium and the superolateral 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. [1] Palpable in its entire length, the crest is convex superiorly but is sinuously curved, being concave inward in front, concave outward behind. [2]
It is thinner at the center than at the extremities.
To the external lip are attached the Tensor fasciae latae, Obliquus externus abdominis, and Latissimus dorsi, and along its whole length the fascia lata; to the intermediate line the Obliquus internus abdominis. To the internal lip, the iliac fascia, the Transversus abdominis, Quadratus lumborum, Sacrospinalis, and Iliacus.
