The expression of p53 in SCC and UC. Tissue samples were stained by hematoxylin-eosin (left column) and anti-p53 antibody diluted 1:50 (Clone DO-7, Leica Biosystems, Wetzlar, Germany; right column). Immunoreactivity of p53 in tumor cells was identified by nuclear brown color. (A and a) Glottic cancer; (B and b) Oral cancer; (C and c) Esophageal cancer (upper portion); (D and d) Esophageal cancer (middle portion); (E and e) Renal pelvic cancer; (F and f) Bladder cancer. Scale bars, 100 μm.