Prevalence of at least 35% at an average abundance of at least 30% MAGE-A4-positive tumor cells was also found for ovarian carcinoma, other (excluding serous/high-grade carcinoma; 44% prevalence, average of 61% positive tumor cells), and gastric cancer (43% prevalence, average of 78% positive tumor cells). The gene discussed is MAGEA4; the disease is neoplasm.