We therefore investigated whether MLH1 rs1799977, MLH1 rs1800734, APEX1 rs1130409, APEX1 rs1760944, MUTYH rs3219489, OGG1 rs1052133, NUDT1 rs1799832, XRCC5 rs828907, XPA rs1800975, and ERCC2 rs13181 were associated with CRC. The gene discussed is OGG1; the disease is colorectal carcinoma.