MUC1 and cancer: Alterations of glycosylation are extended to other proteins involved in cell–cell and cell–matrix interactions such as β-catenin, Intercellular Adhesion Molecule 1 (ICAM-1), Activated Leukocyte Cell Adhesion Molecule (ALCAM), and Mucin 1 (MUC1), impacting various cancer types and influencing invasion, metastasis, and cytoskeletal dynamics [168,169,170].