
Diseases of white blood cells
- disordered formation of various types of leukocytes or an abnormal accumulation or deficiency of these cells.

Agranulocytosis
- decrease in the number of neutrophilic leukocytes in the blood.
- An abnormal decrease in the number of neutrophils, a type of white blood cell.
- A deficiency in the number of granulocytes, a type of white blood cell.

Neutropenia, unspecified
- decrease in the number of neutrophilic leukocytes in the blood.
- An abnormal decrease in the number of neutrophils, a type of white blood cell.
- A deficiency in the number of granulocytes, a type of white blood cell.

Congenital neutropenia

Cyclic neutropenia

Drug induced neutropenia

Neutropenia due to infection

Other neutropenia
- decrease in the number of neutrophilic leukocytes in the blood.
- An abnormal decrease in the number of neutrophils, a type of white blood cell.
- A deficiency in the number of granulocytes, a type of white blood cell.

Functional disorders of polymorphonuclear neutrophils
- recessive X-linked defect of leukocyte function in which phagocytic cells ingest but fail to digest bacteria, resulting in recurring bacterial infections with granuloma formation.

Genetic anomalies of leukocytes
- form of phagocyte bactericidal dysfunction characterized by unusual oculocutaneous albinism, high incidence of lymphoreticular neoplasms, and recurrent pyogenic infections; in many cell types, abnormal lysosomes are present leading to defective pigment distribution and abnormal neutrophil functions; transmitted by autosomal recessive inheritance and a similar disorder occurs in the beige mouse, the Aleutian mink, and albino Hereford cattle.
- A rare autosomal recessive immunodeficiency disorder characterized by abnormal intracellular protein transport. Chediak-Higashi syndrome (CHS) is characterized by immune deficiency; partial oculocutaneous albinism; a bleeding disorder due to deficient platelet dense bodies; neutropenia; neutrophils with impaired chemotaxis and bactericidal activity; recurrent infection; and abnormal natural killer (NK) cell function. CHS may be associated with hepatosplenomegaly, lymphadenopathy, anemia, thrombocytopenia, roentgenologic changes in bones, lungs and heart, and skin and psychomotor abnormalities; it is often fatal in childhood as a result of infection or an accelerated lymphoma-like phase. CHS occurs in mink, cattle, and mice, as well as man.

Eosinophilia
- disordered formation of eosinophils or an abnormal accumulation or deficiency of these cells.

Hemophagocytic syndromes

Decreased white blood cell count

Leukocytopenia, unspecified
- reduction in the number of leukocytes in the blood, the count being 5000 per cubic millimeter or less.
- (LOO-ko-PEE-nya) A condition in which the number of leukocytes (white blood cells) in the blood is reduced.

Lymphocytopenia
- decrease in the proportion of lymphocytes in the blood.
- An abnormally small number of lymphocytes in the circulating blood.

Other decreased white blood cell count

Elevated white blood cell count

Leukocytosis, unspecified
- transient increase in the number of leukocytes in a body fluid.

Lymphocytosis (symptomatic)

Leukemoid reaction

Monocytosis (symptomatic)

Plasmacytosis

Basophilia

Bandemia

Other elevated white blood cell count

Other specified disease of white blood cells

Unspecified disease of white blood cells
- disordered formation of various types of leukocytes or an abnormal accumulation or deficiency of these cells.