SOD2 and neoplasm: Viable tumor cells in lymph nodes upon neoadjuvant treatment (i.e., ypN+) were less likely present in carriers of the homozygous variant CC genotype of SOD2 rs4880 in comparison to the combined group of TT and TC (RR 0.56, 0.33–0.95, p = 0.02, recessive allele effect).