CYP19A1 and cancer: SNPs investigated in the present study include genes like DNMT3A, PIK3CA, FGFR2, GSTP1, ERCC5, AKT1, CASC16, CYP19A1, BCL2, andERCC1.SNPs of these genes have been found in association with cancers of ovary, breast, stomach and lung among different populations, globally15–30.