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Definition of Bone marrow aspiration

Bone marrow aspiration: The removal of a small amount of liquid bone marrow through a needle. The needle is placed through the top layer of bone, and a liquid sample containing bone marrow cells is obtained through the needle by sucking (aspirating) it into a syringe. The suction causes pain for a few moments. Bone marrow aspiration is done to diagnose and follow the progress of various conditions, including anemia and cancer, and to obtain marrow for transplantation.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=2503
Last Editorial Review: 3/19/2012

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