The Axonics INS is placed 4 cm below the iliac crest in the hollow of the ileum. Which bone region is this?

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Multiple Choice

The Axonics INS is placed 4 cm below the iliac crest in the hollow of the ileum. Which bone region is this?

Explanation:
The iliac crest marks the top edge of the ilium, the largest part of the hip bone. The hollow on the inner surface is the iliac fossa, a shallow concavity within the ilium. Placing a point a few centimeters below the crest in that hollow identifies the ilium itself, not the other pelvic bones. The ischium lies lower and behind, the pubis is the anterior portion, and the sacrum is a separate bone at the back forming part of the pelvic wall. So the bone region described is the ilium.

The iliac crest marks the top edge of the ilium, the largest part of the hip bone. The hollow on the inner surface is the iliac fossa, a shallow concavity within the ilium. Placing a point a few centimeters below the crest in that hollow identifies the ilium itself, not the other pelvic bones. The ischium lies lower and behind, the pubis is the anterior portion, and the sacrum is a separate bone at the back forming part of the pelvic wall. So the bone region described is the ilium.

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