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….We only observed a tendency towards an increased risk of poor tumor response and reduced EFS in patients carriers of the polymorphic alleles for ERCC1 Lys504Gln and ERCC1 Asn118Asn polymorphisms.