Overall comparison of differentially expressed genes between SS18-SSX1-expressing eMCs and tumors showed that 3155 and 485 genes were upregulated in synovial sarcoma versus eMCs with an empty vector; fold change > 2.0, and in SS18-SSX1-expressing eMCs versus eMCs with an empty vector; fold change > 2.0, (Figure 2E and Table S2). The gene discussed is SSX1; the disease is synovial sarcoma.