In tumoral cells, a negative staining was observed which is in line with IHC data from the literature, since KRT7 IHC staining (together with KRT20 staining) is usually used to discriminate the origin of a poorly differentiated tumor between KRT7-negative prostatic tumors and KRT7-positive urothelial tumors [29]. This evidence concerns the gene KRT7 and prostate neoplasm.