Breast cancer happens when cells in breast tissue:
- Grow abnormally
- Multiply and
- Enter nearby breast tissue.
The breast is made up of:
- Fatty tissue
- Glandular tissue
- Lobules (also known as milk glands)
- Milk ducts
In women, the lobules are where breast milk is made. When breast feeding, this milk is carried to the nipple through very fine tubes called the milk ducts.
When cells in the breast duct grow abnormally, multiply and enter nearby breast tissue, they can form into a lump (also called a tumour). Breast cancer is mostly common in women however, a small number of men are affected by this disease.
Not all breast lumps are cancerous. If you are worried about your breasts, it is important you visit your GP (General Practitioner or local family doctor) for a breast exam.