Eight single nucleotide polymorphisms in ERCC2, XPC, XPA, ERCC1, ERCC4 and ERCC5 genes were analyzed in 91 patients diagnosed with osteosarcoma and treated with cisplatin….On the contrary, the polymorphic C allele of XPC Lys939Gln was significantly associated with good response (OR=0.34, 95% CI=0.12–0.91, P-value=0.032).