KRT7 and pachyonychia congenita: To assess whether KRT7 expression was different in locally advanced PC from metastatic patients, the expression of KRT7 was explored by IHC (using mouse monoclonal OV-TL 12/30-KRT7 antibody) in a cohort of transurethral resection of prostate (TURPs) specimens from 91 patients organized in a TMA.