Between two histological subtypes, no difference was observed in the expression of XRCC6, PRKDC, LIG4, and PAXX, while expression of XRCC5, XRCC4, and NHEJ1 was higher in adenocarcinoma compared to mucinous adenocarcinoma (Figure 3A). Here, XRCC4 is linked to colon mucinous adenocarcinoma.