Agranulocytosis is a severe condition characterized by a dangerously low level of white blood cells, specifically granulocytes. This places individuals at high risk for infections which can become life-threatening. Common causes include certain medications, autoimmune diseases, and viral infections. Treatment involves addressing the underlying cause and supportive care to prevent infections.

Agranulocytosis has been associated with clozapine. This is a potentially fatal reaction, but can be prevented with careful monitoring of the white blood count.

Lower than normal levels of a type of white blood cells called neutrophils/granulocytes.

Granulocytopenia-- A condition characterized by a deficiency of white blood cells.

An acute condition marked by severe depression of the bone marrow, which produces white blood cells, and by prostration, chills, swollen neck, and sore throat sometimes with local ulceration.