Melanoma-associated antigen-A1 (MAGE-A1), Melanoma-associated antigen-A4 (MAGE-A4), New York Esophageal Squamous Cell Carcinoma-1 (NY-ESO-1) and Preferentially expressed Antigen in Melanoma (PRAME) expression in breast cancers attracted the most attention, but the expression rates reported varied widely (Adams et al. 1; Ademuyiwa et al. 2; Balafoutas et al. 5; Bandić et al. 6; Curigliano et al. 10; Raghavendra et al. 31) Kita-Kyushu lung cancer antigen-1 (KK-LC-1) is another immunogenic CTA considered to be overexpressed in TNBC at mRNA level (Chen et al. 9). The gene discussed is MAGEA4; the disease is breast cancer.