[Limit of efficacy of lymph node dissection in surgery of colon and rectal cancer].
The lymphatic flow of colon and rectum toward the central part of the body can be divided into 7 groups, according to our anatomical understanding of it. After applying a staging method to each lymphatic flow, we analysed 1600 large bowel cancers which were resected at Cancer Institute Hospital during 35 years from 1946. Resectability for cure, 5-year survival rate after surgery were calculated on each stage of 7 groups and the efficacy of lymph node dissection for cancer cure is discussed. The following lymph nodes are defined within the border of effective approach of surgery, lymph nodes within 10 cm anal and oral side from tumor border, lymph nodes up to the root of superior or inferior mesenteric vessels, lymph nodes up to the bifercation of iliac artery, inguinal lymph node metastasis discovered within 6 months after surgery for primary site.
D003110:Colonic Neoplasms / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis; D012004:Rectal Neoplasms / Q000473:pathology / Q000601:surgery*