Figure 1 shows the immunohistochemical findings in representative images that were positive and negative for MLH1, MSH2, MSH6, and PMS2. We used the IHC results of the de-differentiated carcinoma, which we previously reported [38]. Immunoexpression of MMR proteins in type II EC patients with dMMR is summarized in Table S1. Here, MRC1 is linked to carcinoma.