Predictive value of Ki67 and p53 in locally advanced rectal cancer: Correlation with thymidylate synthase and histopathological tumor regression after neoadjuvant 5-FU-based chemoradiotherapy

Figure 2 Ki67 expression in post-therapeutical resection specimens. High proliferative index with more than 90% positive nuclei (magnification × 10; insert: × 40) (A), and low proliferative index with less than 40% positive nuclei (magnification × 20) (B).