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Complete Blood Count (CBC)

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Updated October 10, 2012

Complete Blood Count (CBC) A.D.A.M. Medical Encyclopedia
Definition:

A complete blood count (CBC) is a blood test done to check the levels of certain cells in the blood. In lung cancer, a complete blood count (CBC) is often checked at the time of diagnosis, and to follow the levels of blood cells during treatment.

A CBC tests the levels of red blood cells (RBCs), cells that carry oxygen through the body; white blood cells (WBCs), cells that fight infection; and platelets, cells that help blood to clot.

A low level of red blood cells (RBCs) is known as anemia; white blood cells (WBCs), leukopenia; and platelets, thrombocytopenia.

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