<unk>  is a hematological disorder characterized by an abnormally low number of neutrophil granulocytes (a type of white blood cell). Neutrophils usually make up 50-70% of circulating white blood cells and serve as the primary defense against infections by destroying bacteria in the blood. Hence, patients with<unk>  are more susceptible to bacterial infections and without prompt medical attention, the condition may become life-threatening.<unk>  can be acute or chronic depending on the duration of the illness. A patient has chronic<unk>  if the condition lasts for greater than 3 months. It is sometimes used interchangeably with the term leukopenia. However,<unk>  is more properly considered a subset of leukopenia as a whole. Some patients, such as those with constitutional/benign ethnic<unk> , suffer relatively few complications, however<unk>  related to cytotoxic chemotherapy, hematopoietic stem cell transplant, or other causes of bone marrow suppression may present as a medical emergency.
Neutropenia
Monocytosis
Poikilocytosis
Plasmacytosis
Neuroacanthocytosis
Koilocytosis
Spherocytosis
Pseudocyesis