STX18 and neoplasm: Six genes, JUN, DNM3, DNM3OS, TAF9B, DGKQ, and STX18, which are located at 1p32.1, 1q24.3, Xq21.1, and 4p16.3, showed altered expression that was correlated with the SCNAs in all three cohorts (Supplementary Table 8) and some of the genes exhibited significant association of high-expression with poor clinical prognosis (Supplementary Fig. 9); this indicated that these genes that contained SCNAs were the initial drivers of tumor progression in DDLPS.