Study on Lymph Node Dissection of Right Colon Cancer

223 patients, who received curative resection for right colon cancer, were selected for this study to evaluate the significance of lymph node dissection. The overall metastatic rate was 30.9%, Positive lymph node involvement depended on the histological type. The metastatic rate was 26.3% in patients with well-differentiated adenocarcinoma, 41.5% in moderately differentiated adenocarcinoma, 50.0% in pooly-differantiated adenocarcinoma and 37.5% in mucinous carcinoma. No positive lymph node was noted in patients with tumor located in m. sm, or pm. Positive lymph node involvement was observed in 28.5% of the patients with tumor located in ss, 43.5% in se, and 53.8% in si. Skip metastatis of the lymph node was observed in 13.9%. The incidence of lymph node metastatis was high in the patients who had tumor invasion to the serosa and who had moderately-or poorly-differentiated adenocarcinoma, and right hemicolectomy with radical lymph node dissection was required for these patients.