Understanding your breasts
Women and men both have breast tissue. In women, breasts are made up of milk glands, connective tissue, and fat. The milk glands consist of milk sacs (lobules), where milk is made, and tubes (ducts) that take the milk to the nipple.
During puberty, males produce large amounts of the male hormone testosterone, which stops the growth of lobules in their breast tissue. Breast tissue is made up of millions of cells that are like tiny ‘building blocks’. Breast cancer affects these cells. Breast cancer cells can sometimes use the lymphatic system to spread to other parts of your body.
Breast tissue may include the lower armpit (axilla), which contains lymph nodes (glands). These are part of the lymphatic system, which protects us from infection and disease.
Breast cancer cells can sometimes use the lymphatic system to spread to other parts of your body.