TMPRSS2 and breast cancer: To address this hypothesis, we genotyped tagging SNPs (tagSNPs) of five TTSP genes, TMPRSS1, TMPRSS2, TMPRSS3, TMPRSS7, and TMPRSS11E, two other serine proteases uPA and PRSS8, and HGF, and investigated their association with breast cancer risk and patient survival.