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Updated December 08, 2010

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Definition: a specially trained physician who diagnoses and treats conditions and diseases related to the blood and bone marrow. A hematologist works in a variety capacities, such as clinicians, pathologists, and also as oncologists. A hematologist oncologist specializes in the treatment of blood cancers, such as leukemia.
Joe was referred to a hematologist after several blood tests showed he had an abnormal white cell count.

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