Causes of neutropenia in adults
| Congenital* |
| Constitutional neutropenia |
| Ethnic neutropenia |
| Benign familial neutropenia |
| Cyclic neutropenia |
| Acquired |
| Infection-associated |
| Post-infectious |
| Active infection (sepsis, viruses) |
| Drug-induced |
| Agranulocytosis |
| Mild neutropenia |
| Autoimmune |
| Primary autoimmune |
| Secondary autoimmune |
| Felty syndrome |
| Malignancy |
| Acute leukemia |
| Myelodysplasia |
| LGL leukemia |
| Myeloma, lymphoma |
| Myelophthisic processes |
| Dietary |
| B12, folate deficiency |
| Copper deficiency |
| Global caloric malnutrition |
| Congenital* |
| Constitutional neutropenia |
| Ethnic neutropenia |
| Benign familial neutropenia |
| Cyclic neutropenia |
| Acquired |
| Infection-associated |
| Post-infectious |
| Active infection (sepsis, viruses) |
| Drug-induced |
| Agranulocytosis |
| Mild neutropenia |
| Autoimmune |
| Primary autoimmune |
| Secondary autoimmune |
| Felty syndrome |
| Malignancy |
| Acute leukemia |
| Myelodysplasia |
| LGL leukemia |
| Myeloma, lymphoma |
| Myelophthisic processes |
| Dietary |
| B12, folate deficiency |
| Copper deficiency |
| Global caloric malnutrition |
Excludes forms of congenital neutropenia that would be diagnosed in childhood (eg, severe congenital neutropenia or neutropenia occurring in the context of a larger congenital syndrome).