Which pelvic landmark lies at the posterior region near the sacroiliac joint?

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

Answer: (C)

The most relevant concept is the location of posterior pelvic landmarks. The sacroiliac joints are at the back where the sacrum meets the ilium, and on the back of the ilium you’ll find the posterior spines. The posterior inferior iliac spine sits along the posterior border of the ilium near the sacroiliac joint, making it the landmark that lies closest to this joint on the back of the pelvis. The iliac crest runs along the top edge of the ilium, the pubic symphysis is at the front where the two pubic bones meet, and the anterior superior iliac spine is located on the front. So the posterior inferior iliac spine is the landmark near the sacroiliac joint.