Of the 31 dMMR cancers, 29 cases were found to have either loss of MLH1 or MSH2 protein expression; 3 cases had loss of MSH6 expression, all accompanied by loss of MSH2 expression; 5 cases had loss of PMS2 expression, which were accompanied in 3 cases by loss of MLH1 expression. Here, PMS2 is linked to cancer.