KLK12 and neoplasm: In order to determine KLK12 mRNA expression levels in TNBC, we developed a sensitive quantitative real-time PCR assay (qPCR) and subsequently analyzed whether KLK12 mRNA expression is associated with established clinical variables such as age, lymph node status, tumor size, and histological grade as well as with disease-free (DFS) and overall survival time (OS) of the patients.