Abstract
Histopathological types and survival were studied in 408 colo-rectal cancer patients. The specimens were devided into well, moderately, or poorly, differentiated adenocarcinoma and others. The rate of lymphatic metastasis and the depth of the infiltration through the rectal wall was more prominent in moderately differentiated adenocarcinoma. In patients with moderately differentiated adenocarcinoma had poorer survival rate, and shorter survival time than patients with well differentiated adenocarcinoma having the same background facters.