A case is described of metastatic cancer of the breast, secondary to a gastric adenocarcinoma, coinciding with a scirrhous carcinoma of the opposite breast ( first case published in our country). The histopathological coincidence between the primary tumor (studied in autopsy) and the mammary metastasis ( analyzed after surgical remo val), confirmed the gastric origin of the latter. The more remarkable points of the clinico-patrological facts of these secondary tumors are described, and emphasis is placed on the dire necessity of an early diagnosis to avoid unnecessary radical surgical removal.

Se presenta una observción de cáncer mamario metastásico, secundario a un adenocarcinoma gástrico, coincidiendo con un arcinoma esquil'roso dela mama contralateral (primer aso de la literatura  nacional). La concordancia histopatológica entre el tumor primario (estudiado en la autops'