MAGEA3 and non-small cell lung carcinoma: [19, 20] In addition, lung cancers express unmutated tumor antigens, such as MAGE‐A3, a cancer‐testis antigen predominantly found in ≈30–50% of NSCLC patients.[21] The generation of non‐mutated tumor‐associated antigens or mutated neoantigens forms the basis of lung cancer immunogenicity, which directly influences TILs in NSCLC.