[Breast cancer classification is evolving].

Diagnostic strategy of breast cancer has changed enormously during the last thirty years. To classical obligatory morphological data on the macroscopical and microscopical levels are now added imunocytochemistry, which is capable of detecting therapeutic targets such hormonal receptors and HER2 (Human Epidermal growth factor Receptor2), and molecular biology, which yields the molecular profile of tumors and their multigenic properties. By leaning on up-to-date classifications (TNM system and UICC grades), the pathologist is able to evaluate not only diagnostic but also pronostic criteria, leading to personalized and predictive treatments.