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

These two spines are separated by a bony notch.

They appear as two dimples in the skin, at the level of the lower back.

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

This human musculoskeletal system article is a stub.