• Department of General Surgery, Shanghai Jing′an District Center Hospital, Shanghai 200040;
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Objective  To study the rule of lymphatic metastasis and to evaluate the extent of curative resection in advanced colorectal cancer.
Methods  One thousand and five lymph nodes from 114 consecutive patients with colorectal cancer underwent extended D3 resection were analyzed and classified as peritumor, longitudinal, and upward spread distribution. Results  The metastatic rate and incidence of lymph node metastasis in peritumor, longitudinal as well as upward spread (N2 and N3) was 43.9% and 37.2%, 32.5% and 15.9% as well as 29.8% (19.3% and 10.5%) and 12.1% (16.6% and 7.8%) respectively. The distribution rate of metastatic lymph nodes was 17.5% and 23.5% in the longitudinal and upward spread respectively. In the longitudinal spread, most of lymph node metastasis was seen within 10 cm. Within 2 cm on the anal side in rectal cancer, the metastasis rate was 5.5%, and there was no metastasis in 2-4 cm. The lateral metastasis rate was 0%, 8.7% and 12.5% in the rectosigmoid (Rs), upper rectum (Ra) and lower rectum (Rb) respectively.
Conclusion  Advanced colorectal cancer tend to metastasize to longitudinal and upward lymph nodes. Jump metastasis is also a feature. In the lower rectal cancer within 6 cm from the anal verge or beyond pT3, there is a high risk of lateral metastasis. Extended D3 radical resection is necessary for colic cancer, but high ligation of the inferior mesenteric artery root as well as lateral lymphadenectomy and total mesenteric excision should also be performed for rectal cancer. There is no residual tumor tissue in the anastomosis when the excision distance is beyond 2 cm from the anal margin in rectal cancer.

Citation: GAO Youfu,JIANG Bojian,SUN Rongxun,et al.. CLINICAL STUDIES ON THE RULE OF LYMPHATIC METASTASIS FOR ADVANCED COLORECTAL CANCER. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2000, 7(1): 27-29. doi: Copy