The Relationship between Clinicopathological Factors and the Reduction of Pyrimidine Nucleoside Phosphorylase Activity after Preoperative Administration of 5′-Deoxy-5-fluorouridine

The relationship between clinicopathological factors and change of PyNPase activity in colorectal tumor tissues after preoperative administration of 5′-deoxy-5-fluorouridine. MP: Muscularis propia; SS: subserosa; SE: serosa; SI: invasion to the surrounding organ; Well: well-differentiated adenocarcinoma; Moderately: moderately differentiated adenocarcinoma; Poorly: poorly differentiated adenocarcinoma. N.S.: not significant; *Mann-Whitney U-test; **Kruskal-Wallis test; Clinicopathological factors are classified according to the General Rules for Clinical and Pathological Studies on Cancer of the Colon, Rectum and Anus: Japanese Society for Cancer of the Colon and Rectum.