What are causes of eosinophilia?

• Familial or congenital (rare)
• Acquired
  • Primary (clonal)
    • Myeloproliferative neoplasms (MPN)
    • Myelodysplastic syndrome (MDS)
    • MDS/MPN overlap syndromes
    • Acute myeloid leukemia (AML)
    • Mastocytosis
    • Myeloid/lymphoid neoplasms with eosinophilia (rearrangement of PDGFRA, PDGFRB, or FGFR1, or with PCM1-JAK2)Secondary (reactive)
  • Secondary (reactive)
    • Allergies
    • Helminth infections
    • Drug reactions
    • Autoimmune disorders
    • Cancer
    • Lymphocyte variant hypereosinophilia syndrome (HES)

Learn more here.