A granulocyte is a type of leukocyte (white blood cell) that possesses granules in its cytoplasm and is formed in the bone marrow. Granulocytes form about 70% of all leukocytes. They come in three varieties: neutrophils, eosinophils, and basophils.
Agranulocytosis is a blood condition in which the bone marrow produces inadequate numbers of granuloctyes (white blood cells that eliminate bacteria). It is a rare complication of certain drugs and systemic diseases. Severe throat infections and sepsis are common; antibiotics are the mainstay of treatment.