Which anatomical structure is located at the level of the iliac crest?

The body of L4 is the correct anatomical structure that correlates with the level of the iliac crest. The iliac crest, which is the upper border of the ilium and a prominent landmark in the pelvic region, is situated at the level of the intervertebral disc between the third and fourth lumbar vertebrae (L3-L4). This makes the body of L4 the vertebral level that directly corresponds with the iliac crest.

Understanding the relationship between skeletal landmarks and vertebral levels is important for various medical procedures and imaging techniques, ensuring accurate localization. The iliac crest serves as a useful reference point in many clinical examinations and interventions, particularly in the context of block anesthesia and lumbar punctures.