A form of ANEMIA in which the numbers of RED BLOOD CELLS as well as white cells are reduced. This type of anemia is caused by exposure to chemicals (such as solvents), toxic heavy metals, some drugs like chloramphenicol, or ionizing radiation (like X rays). Radiation therapy, chemotherapy, and lead poisoning can damage bone marrow, thus reducing red blood cell production. Both the blood platelet count and immunity decline, with a concomitant increased susceptibility to infection. Destruction of the bone marrow is potentially life-threatening.
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