CYP20A1 and small cell lung carcinoma: CYP20A1 rs2043449 polymorphism was found to increase the LC susceptibility in some subgroups (Male, CC/CT vs TT: adjusted OR = 1.50, 95% CI = 1.00‐2.24, P = 0.049 and CC vs TT: adjusted OR = 1.50, 95% CI = 1.03‐2.16, P = 0.033; III‐IV stage, CC vs TT: adjusted OR = 1.47, 95% CI = 1.01‐2.15, P = 0.044; SCLC, CC: adjusted OR = 5.36, 95% CI = 1.06‐27.21, P = 0.043 and CC vs CT/TT: adjusted OR = 5.27, 95% CI = 1.04‐26.66, P = 0.045, Table 9).