Myeloid and lymphatic tumors, which are accompanied by eosinophilia and rearrangement of platelet-derived growth factor receptor α (PDGFRA), platelet-derived growth factor receptor β (PDGFRB), and fibroblast growth factor receptor 1 (FGFR1), are classified as an independent disease type in 2008 World Health Organization classification of hemolymph tumors. Here, PDGFRB is linked to Increased total eosinophil count.