EWSR1 and Ewing sarcoma: Interestingly, MET was expressed but not phosphorylated in a genetically modified Ewing sarcoma cell line with shRNA-silencing of the specific Ewing sarcoma oncogene EWS-FLI1, which links the EWS-FLI1 oncogene to distinct scatter factor RTK expression patterns of pediatric sarcomas (Figure S2).