Diagnosis of chronic eosinophilic leukemia and hypereosinophilic syndrome. Table was adapted with permission from Jaffe et al.4 Ph indicates Philadelphia chromosome; CML, chronic myelogenous leukemia; AML, acute myeloid leukemia; PV, polycythemia vera; ET, essential thrombocythemia; and CIMF, chronic idiopathic myelofibrosis.