alleryStart learning →Which site was traditionally used for bone marrow sampling with a large-bore needle?
AThe proximal end of the tibia
BThe sternum at its lower third
CThe shaft of the femur
DThe region near the iliac crest
Answer & Solution
Correct answer: D. The region near the iliac crest
1. Marrow sampling needs active red marrow that is close to the surface and away from vital organs.
2. The region near the iliac crest of the pelvic bones meets both conditions.
3. That accessibility is why it was the preferred site, despite the procedure being quite painful.
4. The femoral shaft holds little active marrow in adults, so it fails the first condition.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.2 Production of the Formed Elements_
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