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. Palpable in its entire length, it is convex in its general outline but is sinuously curved, being concave inward in front, concave outward behind.
Anatomy
It is thinner at the center than at the extremities, and ends in the anterior and posterior superior iliac spines.
The surface of the crest is broad, and divided into external and internal lips, and an intermediate line.
About 5 cm behind the anterior superior iliac spine there is a prominent tubercle on the outer lip.
To the external lip are attached the Tensor fasciæ latæ, 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 fascia iliaca, the Transversus abdominis, Quadratus lumborum, Sacrospinalis, and Iliacus.
Clinical significance
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.
Additional images
Muscles connecting the upper extremity to the vertebral column. Left iliac crest is labeled in red.
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Plan of ossification of the hip bone.
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The Obliquus internus abdominis.
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Muscles of the iliac and anterior femoral regions.
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The relations of the kidneys from behind.
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Iliac crest labeled at center right.
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See also
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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