MUC21 and breast cancer: ,49 Therefore, the data presented here can also serve as a resource for the identification of novel diagnostic biomarkers or potential therapeutic targets, as galectin-7 (LGALS7) for Squamous cell carcinomas, galectin-4 (LGALS4) for gastro-intestinal cancers, MUC21 for lung adenocarcinoma, MUC15 for thyroid cancer and MUCL1 for breast cancer.