The survival rates and mean survival times of Dukes B patients in group II were as same as that in group I . The survival rates of 3-year were 93% and92%, that of 5-year 91% and 88%,the mean survival times 43.2 months and 42.5 months, respectively.

• B期病人单纯手术与综合治疗生存曲线无显著差异；三年生存率分别是92%25、93%25；五年生存率分别是88%25、91%25；平均生存期分别是42.；5月、43