The prognosis of breast cancer is evaluated with respect to age. In theis is study, the patients\u27 age was divided into the three catgories, younger (under age 35), middle-aged (over age 36 and under age 65), and older (over age 66) patients. The survival rates among the three goups were almost the same according to age and disease stage. However, the prognosis in younger patients with advanced disease stage was unsatisfactory and it was inferior to that in older ones. It is concluded that advanced disease in younger patients contributed to poor prognosis in reflection of changes in hormonal circumstances such as pregnancy, delivery and lactation
