The revised 2008 WHO classification recognizes both molecularly defined ('myeloid and lymphoid neoplasms with eosinophilia and abnormalities of PDGFRA, PDGFRB, or FGFR1') and undefined (chronic eosinophilic leukemia, not otherwise specified) eosinophilic myeloid disorders.
C0000768
Congenital Abnormality