Additionally, no published investigations had provided clues among XPB (rs2276583), XPF (rs1799797), CSB (rs3793784), DDB2 (rs3781619 and rs2029298), FEN1 (rs174538 and rs4246215), APEX1 (rs1130409) and the survival outcomes in NSCLC patients. The gene discussed is FEN1; the disease is non-small cell lung carcinoma.