3. Exclusion: Not meeting criteria for CML, other MPNs, or myeloid/lymphoid neoplasms with eosinophilia and defining gene rearrangements (e.g., PDGFRA, PDGFRB, FGFR1, JAK2). The gene discussed is FGFR1; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.