Neutropenia causes
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ogheneochuko Ajari, MB.BS, MS [2]
Overview
Neutropenia may be caused by drugs, cancer, radiation, vitamin B12 deficiency or folate deficiency. Marginalization and sequestration of neutrophils also can cause neutropenia following procedures such as hemodialysis.
Causes
The most common etiologies are constitutional or benign ethnic neutropenia (BEN) and drug-induced neutropenia.
Malignancy is often associated with neutropenia, due to impaired production from myelodysplastic syndromes and hematological malignancies with bone marrow infiltration, hemolysis and impaired production from cytotoxic chemotherapy, and antibody-mediated destruction of neutrophils.
Alternative etiologies include post-infectious neutropenia resulting from bacterial, fungal, or viral infections. While bacterial infections typically cause leukocytosis, salmonella and shigella enteritis, brucellosis, tularemia, tuberculosis, and rickettsial diseases, such as Rocky Mountain spotted fever can present with neutropenia. Parasitic diseases with neutropenia include leishmaniasis with hemolysis and splenic sequestration and malaria due to hyperreactive malarial splenomegaly (HMS). Viral etiologies include HIV, EBV, CMV, HHV-6, viral hepatitis, dengue fever, yellow fever, measles, varicella, and rubella.
Immunodeficiencies are frequently associated with neutropenia (38% in Hyper IgM syndrome, 12% in CVID, and 7% in X-linked agammaglobulinemia) as are autoimmune disorders including up to 50% of patients with systemic lupus erythematosus, yet with lower overall prevalence. While rheumatoid arthritis infrequently presents with neutropenia, severe neutropenia can develop in the setting of large granular lymphocyte (LGL) leukemia or Felty syndrome [1].
Finally, nutritional deficiencies resulting in neutropenia are typically attributed to vitamin B12, folate, and copper and are related to inadequate dietary intake, pernicious anemia, bariatric surgery, and malabsorptive syndromes.
Life Threatening Causes
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
Common Causes
- Aplastic anemia
- Cancer
- Cytotoxic chemotherapy
- Hemodialysis
- Medications
- Radiation therapy
- Vitamin deficiencies e.g. folate, Vitamin B12
Causes by Organ System
Causes in Alphabetical Order
References
- ↑ Bucknall RC, Davis P, Bacon PA, Jones JV (2009). "Neutropenia in rheumatoid arthritis: studies on possible contributing factors". Ann Rheum Dis. 41 (3): 242–7. PMID 6979979.