CD99 and Ewing sarcoma: Next, expression levels of eight EWS-FLI1 associated target genes (GLI1, NEX2.2, CyclinD, c-MYC, NR01B, IGF1R, EZH2, and CD99) which were known to be upregulated, and three genes (FOXO1, IGFBP3, and LOX) known to be down regulated in Ewing’s sarcoma was assessed.