When the right colonic cancer is defined as that locating from the cecum to right side of the transverse colon, a total of 54 cases of right colonic cancer had been experienced at the department in a past 11-year period. These 54 cases were studied about the influence of histological type and lymph node metastasis on the resectability. Initial clinical manifestations included abdominal distension, diarrhea, and constipation due to a narrowing or obstructive local extention, which represented 76% of all manifestations. Macroscopically there were 49 cases of type 2 and 5 cases of type 3, and histologically 28 out of 44 cases had well differentiated carcinoma. Tumor size was over 6.4cm in diameter. Three cases of ascending colon cancer which exceeded 214 were of poorly differentiated carcinoma, comprising of 2 absolute nencurative resection cases and one relatively curative resection case (having multiple cancer). Invasion into the adjacent organs was noted in 13 cases, which included 12 resectable cases.
Operation of right colonic cancers often results in absolute non-curative resection according to local extention including peritoneal dissemination. Lymph node metastasis did not disturb resectability in well differentiated cancer cases. Moreover, cases of n3 or over were found in those of moderately or poorly differentiated adenocarcinoma.