Which landmark is located at the posterior aspect of the ilium near the sacroiliac joint?

Which landmark is located at the posterior aspect of the ilium near the sacroiliac joint?

• A. Iliac Crest
• B. Pubic Symphysis
• C. ASIS
• D. PIIS

Answer: (D)

The feature being described is the posterior inferior iliac spine. On the back of the ilium, just below the posterior superior iliac spine, sits this inferior projection near the sacroiliac joint. It helps mark the lower boundary of the greater sciatic notch and serves as a landmark in relation to the SI joint. The other options are distinct: the iliac crest runs along the top edge, the pubic symphysis is at the front midline where the pubic bones meet, and the anterior superior iliac spine sits at the front of the pelvis.

The feature being described is the posterior inferior iliac spine. On the back of the ilium, just below the posterior superior iliac spine, sits this inferior projection near the sacroiliac joint. It helps mark the lower boundary of the greater sciatic notch and serves as a landmark in relation to the SI joint. The other options are distinct: the iliac crest runs along the top edge, the pubic symphysis is at the front midline where the pubic bones meet, and the anterior superior iliac spine sits at the front of the pelvis.