Wing of ilium / Iliac wing
Latin synonyms: Ala ossis ilii
The iliac wing/gluteal fossa is also known as the wing of ilium or the ala. The ilium, one of the three bones of the hip bone, is considered to have two parts: the lower part (body) and the upper part (iliac wing). The iliac wing is considered to be the surface that expands from the acetabulum. The iliac wing consists of an internal and external surface separated by the iliac crest superiorly. The iliac fossa is located on the internal surface and gives origin to the iliacus muscle. The iliac wing forms the lateral boundary of the greater or “false” pelvis.
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