[Breast cancer diagnosed in the pre-clinical stage with the phenomena of histological regression (author's transl)].

The discovery of carcinomatous cells in a discharge from a breast, without any other clinical, mammographic or thermographic sign, allowed the removal of a carcinoma in its pre-clinical stage. The histological study in a series of cuts showed a carcinoma that was still intraductal and which showed signs of cellular regression accompanied by marked peri-canalicular sclerosis associated with inflammatory infiltration. This observation allows commentaries to be made concerning the immunological process that goes with carcinoma in its intra-epithelial stage and permits the possibility of predicting an advance in the understanding and treatment of carcinomata which should be diagnosed very early.