Reproductive System

Female Reproductive System

Where do most breast cancers begin?

Most breast cancers begin in the cells that line the ducts. The ducts are the passages that connect the lobules (the milk-producing glands) to the nipples. Some cancers begin in the cells of the lobules.


This is a web preview of the "The Handy Anatomy Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App