The main function of the breasts is to make
milk for breastfeeding. Breasts have 2 main
types of tissues: glandular tissues and
supporting (stromal) tissues.
The glandular part of the breast includes the
lobules and ducts (shown in the picture
In women who are breastfeeding, the
cells of the lobules make milk. The milk then
moves through the ducts – tiny tubes that
carry milk to the nipple. Each breast has
several ducts that lead out to the nipple.
The support tissue of the breast includes fatty
tissue and fibrous connective tissue that give
the breast its size and shape.
Any of these parts of the breast can undergo
changes that cause symptoms. These breast
changes can be either benign (non-
cancerous) breast conditions or breast