Greater sciatic foramen

The greater sciatic foramen is a major foramen of the pelvis.

Boundaries
It is bounded as follows:
 * anterolaterally by the greater sciatic notch of the illium
 * posteromedially by the sacrotuberous ligament
 * inferiorly by the sacrospinous ligament and the ischial spine
 * superiorly by the anterior sacroilliac ligament

Contents
It is partially filled up, in the recent state, by the Piriformis which leaves the pelvis through it.

The following structures make their exit from the pelvis through the greater sciatic foramen: