Exclusion of the following diseases | |
1. Reactive eosinophilia | |
2. Lymphocyte-variant hypereosinophilia (cytokine-producing, immunophenotypically-aberrant T-cell population) | |
3. Chronic eosinophilic leukemia, NOS | |
4. WHO-defined myeloid malignancies associated eosinophilia (e.g. MDS, MPNs, MDS/MPNs, or AML) | |
5. Eosinophilia-associated MPNs or AML/ALL with rearrangements of PDGFRA, PDGFRB, or FGR1. |