Lobular means that the cancer began in the milk-producing lobules, which empty out into the ducts that carry milk to the nipple. Carcinoma refers to any cancer that begins in the skin or other tissues that cover internal organs — such as breast tissue.

What does lobular mean medically?

Medical Definition of lobular

: of, relating to, affecting, or resembling a lobule lobular fatty degeneration of the liver— Leopold Bellak.

What are lobules in breast?

A small part of a lobe in the breast. A breast lobule is a gland that makes milk. Anatomy of the female breast. The nipple and areola are shown on the outside of the breast.