(a) Association between mucin MUC1 expression and iCD10, transforming growth factor‐β1 expression, and tumor budding at invasion fronts on serial sections of colorectal cancer. High MUC1 expression in tumor cells, (b) high‐grade infiltration of CD10+ immune cells (iCD10), (c) high transforming growth factor‐β1 expression in tumor cells, and (d) high tumor budding grade (pan‐cytokeratin) in the same area. Magnification, ×200.