Other examples of deregulated tyrosine kinases fusion genes which are found in myeloid malignancies include TEL-ABL, TEL-JAK2, FLT3/ITD in acute myeloid leukemia (AML), ETV6-PDGFRB (TEL-PDGFRB) in chronic myelomonocytic leukemia (CMML), and FIP1L-PDGFRA in chronic eosinophilic leukemia (CEL) [4], [5]. The gene discussed is PDGFRB; the disease is Chronic Eosinophilic Leukemia, Not Otherwise Specified.