What does Breast, infiltrating ductal carcinoma of the mean?

Breast, infiltrating ductal carcinoma of the meaning in Medical Dictionary

one of the acknowledged certain habits of breast cancer that begins in the cells that form the ducts regarding the breast. The most typical kind of cancer of the breast, it may appear as a smooth-edged lump into the breast. On physical examination, this lump often feels much harder or firmer than benign lumps inside breast.