Ironically, other ETS TFs involved in hematopoiesis (e.g., ERG, FEV) are also seen in non-hematological malignant fusions (ERG/TMPRSS2, ERG-EWS, FEV-EWS) (i.e., prostate cancer) as well as hematological malignant fusions (e.g., TLS/FUS-ERG and FLI1-EWS seen in myeloid leukemia and Ewing’s Sarcoma, respectively) (93). Here, FEV is linked to Ewing sarcoma.