Mucin1 (MUC1), a cell membrane glycoprotein is found to be overexpressed and aberrantly glycosylated in cancer.132 Tecemotide (L‐BLP25) is a MUC1 antigen‐specific peptide vaccine which has capacity to evoke a T‐cell response against this antigen which is overexpressing in NSCLC. This evidence concerns the gene MUC1 and cancer.