No influence on the risk of developing NSCLC was found in our patients for the following gene polymorphisms: VDR Cdx2 rs11568820, VDR TaqI rs731236, VDR ApaI rs7975232, VDR FokI rs2228570, CYP27B1 rs4646535, CYP27B1 rs3782130, CYP27B1 rs10877012, CYP27B1 rs703842, CYP24A1 rs6068816, CYP24A1 rs4809957, CYP2R1 rs10741657, and GC rs7041. The gene discussed is CYP24A1; the disease is non-small cell lung carcinoma.