Breast cancer presents important differences in distribution of histopathologic factors between younger and older patients but it's less clear if reduction of survival which often occurs in cancer of the youth depends on the concomitant presence of negative prognostic factor or if age alone acts as a factor indicating more aggressiveness. Many studies seem to indicate that young age at diagnosis is an independent predictive factor mostly in patients with early stage of disease and negative nodes. Other studies assert that age can be considered as the most important predictive factor after nodes involvement.