KRT5 and prostate intraepithelial neoplasia: Although this decrease in percent cilia on CK5+ and CK5-of PIN was not statistically significant, 62.5% of patients had an abnormally low percent of ciliated CK5+ cells and 33.3% of patients had an abnormally low percent of ciliated CK5-cells (Figure 2C, 2D, bottom and Table S2B in Table S2).