![Posterior Superior Iliac Spine](https://cdn.3d4medical.com/complete_anatomy-userdata/video-sticky/1a/4a82fabd85.webp?fm=webp&w=738&q=75)
Description
The posterior superior iliac spine (PSIS) is the blunt process that marks the posterior end of the iliac crest. It cannot be palpated but a small skin dimple often marks its location.
The posterior superior iliac spine provides an attachment site for the sacrotuberous and posterior sacroiliac ligaments.
Related parts of the anatomy
![Complete Anatomy](/images/ca-banner.webp?fm=webp&w=230&q=75)