Notably, while the prevalence of MAGE-A4 was determined to be below average for synovial sarcoma (33%) in this study, in all cases when it was detected, abundance was uniformly very high with 98% and more tumor cells being positive for MAGE-A4 and high H-scores of 196 and above (Table 1). The gene discussed is MAGEA4; the disease is synovial sarcoma.