[Definition and anatomo-pathologic classification of benign breast diseases].

Most pathological changes in the mammary gland that are not tumours are fibrocystic diseases. Their classifications, at first purely descriptive, can now be used to predict the risks of cancer. All the same, there is no real parallel between these classifications and the difficulties in differential diagnosis that these lesions present for the pathologist. This is so true that the risk has to be defined by more objective markers than one morphological finding.