Posterior inferior iliac spine

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Posterior inferior iliac spine
Right hip bone. External surface. (Posterior inferior spine labeled at center left.)
Latin spina iliaca posterior inferior
TA A02.5.01.114
FMA 63615
Anatomical terms of bone

The posterior inferior iliac spine is an anatomical landmark that describes a bony "spine", or projection, at the posterior and inferior surface of the iliac bone.

It is one of two such spines on the posterior surface, the other being the posterior superior iliac spine. These two spines are separated by a bony notch. They appear as two dimples in the skin, at the level of the lower back.

The posterior inferior iliac spine corresponds with the posterior extremity of the auricular surface.[clarification needed]

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

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