Anisocytosis - Definition

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Anisocytosis indicates the presence of similar cells, but of different dimensions. Anisocytosis can describe a large difference between the diameter of white blood cells, but this term is most often used for red blood cells which, in certain illnesses, can have widely varying dimensions. When the small cells are more numerous it's called micro-anisocytosis, and when the large cells are more numerous it's called macro-anisocytosis. Anisocytosis is found in certain types of anemias, leukemias, cancers, or chemotherapies.