The highest point of the iliac crest is the anterior superior iliac spine or the iliac tubercle?

1. The highest point of the iliac crest is neither the anterior superior iliac spine nor the iliac tubercle.

2. But the iliac tubercle is slightly higher than the anterior superior iliac spine, and the highest point of the iliac crest is higher (when standing).

3. The fan-shaped bone plate that protrudes upward from the ilium is called the iliac wing, and the upper edge of the iliac wing is hypertrophic and curved upward in an arcuate shape, which is called the iliac crest. The anterior edge of the wing is curved downward, reaching the acetabulum, and there are two bony processes, the upper and lower, called the anterior superior iliac spine and the anterior inferior iliac spine. About 5-7 cm from the anterior superior iliac spine to the top and back, the iliac crest is thicker and protrudes outward, called the iliac (crest) tubercle, which is a commonly used site for bone marrow aspiration.

4. The line connecting the highest points of the iliac crests on both sides is about level with the spinous process of the fourth lumbar vertebra, which is a sign of counting vertebrae.

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