Mainly, the allelic variants of CYP3A4 rs2740574 (∗1B), CYP3A4 rs35599367 (∗22), CYP3A5 rs776746 (∗3), GSTM1-null, GSTP1 rs1695, GSTT1- null, UGT1A1 rs8175347 (∗28), BLMH rs1050565, ERCC1 rs11615, ERCC1 rs3212986, ERCC2 rs13181, ERCC2 rs1799793, ERCC2 rs238406, and MDR1 rs1045642 were analyzed with non-genetic factors to validate their association with ADRs in testicular cancer patients treated with BEP schedule. Here, ERCC2 is linked to testicular cancer.