dMMR was significantly associated with ascending colon (p < 0.001), mucinous adenocarcinoma (p < 0.001) poorly differentiated carcinoma (p < 0.001), peritumoral lymphocytic infiltration (p = 0.002) and CDX2 expression loss (Fisher’s Exact Test, p < 0.001). This evidence concerns the gene CDX2 and mucinous adenocarcinoma.