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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.

Iliac crest
Pelvic girdle illustration.svg
Pelvic girdle.
Pelvis diagram.png
Overview of Ilium as largest bone of the pelvis.
Latincrista iliaca
Anatomical terms of bone



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.


The iliac crest is derived from endochondral bone.


Clinical significanceEdit

A fracture of the left iliac wing

The iliac crest has a large amount of red bone marrow, and thus it is the site of bone marrow harvests (from both sides) to collect the stem cells used in bone marrow transplantation. The iliac crest is also considered the most ideal donor site for bone grafting when a large quantity of bone is needed. For example, oral and maxillofacial surgeons will often use iliac crest bone to fill in large osseous defects of the oral cavity caused by severe periodontal disease, excess bone resorption following tooth loss, trauma, or congenital defects including alveolar clefts.[4]

The top of the iliac crests also marks the level of the fourth lumbar vertebral body (L4), above or below which lumbar puncture may be performed.

Additional imagesEdit

See alsoEdit


This article incorporates text in the public domain from page 234 of the 20th edition of Gray's Anatomy (1918)

  1. ^ Platzer (2004), p 186
  2. ^ Palastanga (2006), p 243
  3. ^ Bogduk (2005), p 106
  4. ^ Rose, Louis F.. Periodontics: Medicine, Surgery and Implants. Mosby, 072004.
  • Bogduk, Nikolai; Endres, Stephen M. (2005). Clinical anatomy of the lumbar spine and sacrum (4th ed.). Elsevier Health Sciences. p. 106. ISBN 0-443-10119-1.
  • Palastanga, Nigel; Field, Derek; Soames, Roger (2006). Anatomy and Human Movement: Structure and Function. Elsevier Health Sciences. ISBN 0-7506-8814-9.
  • Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). Thieme. ISBN 3-13-533305-1.

External linksEdit