An increase in the number of circulating granulocytes in the bloodstream.


Granulocytosis is a feature of certain bacterial infections, autoimmune disease, and leukemia. It may involve an increase in the number of granulocytes such as neutrophils, eosinophils, and basophils in the blood.

Word origin: granulocyte + Greek -osis (an increase, a condition).

Compare: agranulocytosis.
See also: lymphocytosis, neutrophilia, eosinophilia, basophilia.

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