MUC1 and esophageal squamous cell carcinoma: BI1361849 includes the five antigens encoded by CV9201 (cancer/testis antigen 1B [New York esophageal squamous cell carcinoma, NY-ESO-1], melanoma antigen family C1 [MAGE-C1] and C2 [MAGE-C2], baculoviral inhibitor of apoptosis repeat-containing 5 [survivin], and trophoblast glycoprotein [5T4]), together with the mucin-1 (MUC-1) antigen [7].