Interestingly, women seem to be prone to an increased risk of early-onset lung cancer if they are carriers of the minor allele of CYP1B1 SNP rs1056836 (10042C>G/T), but a nonsignificant increased risk was observed for the carriers of the minor allele of CYP2A13 SNP rs1709084 (13103A>G) [76]. This evidence concerns the gene CYP1B1 and lung cancer.