In the UK, breast cancer is the most common type of cancer among women. More than 45,500 cases of breast cancer are diagnosed every year, usually in women over 50 who have reached menopause. However, it is possible for women of any age to get breast cancer and, in rare cases, the condition can affect men.
Anatomy of the breast
A woman's breasts are made up of fat, connective tissue and thousands of tiny glands (known as lobules), which produce milk. If a woman has a baby, the milk is delivered to the nipple through tiny tubes called ducts, which allow her to breastfeed. Breast cancer usually shows as a lump or thickening in the breast tissue, although most breast lumps are not cancerous.
Types of breast cancer
There are several different types of breast cancer, which can develop in different parts of the breast. The most common is known as ductal breast cancer, which develops in the cells that line the breast ducts. Ductal breast cancer accounts for about 80% of all cases of breast cancer.
Other less common types of breast cancer include lobular breast cancer, which develops in the cells that line the milk-producing lobules, inflammatory breast cancer and Paget's disease of the breast. Breast cancer can spread to other parts of the body, such as the liver, bones or lymph nodes (small glands that remove bacteria from the body).
Breast screening
The exact cause of breast cancer is not fully understood, but many factors increase the likelihood of developing it, including age and family history of breast cancer.
Women who have a higher-than-average risk of developing breast cancer may be offered screening and genetic testing for the condition. As the risk of breast cancer increases with age, all women between the ages of 50 and 70 are entitled to be screened once every three years as part of the NHS Breast Screening Programme.
Breast cancer can be treated using a combination of surgery, chemotherapy and radiotherapy. Some cases of breast cancer may also be treated using biological or hormone treatments.
One in nine women are affected by breast cancer during their lifetime. There is a good chance of recovery if it is detected in its early stages. For this reason, it is vital that women check their breasts regularly for any changes and always get any changes examined by their GP.
Online Personal Education and Risk Assessment (OPERA)
If you are concerned about your risk of developing inherited breast cancer, you can use Macmillan's online interactive assessment tool which is called OPERA.
The tool is based on the National Institute for Health and Clinical Excellence (NICE) guideline for the classification and care of women at risk of familial breast cancer. It is designed to be used by patients and health professionals to assess a person's risk of developing the condition based on their family history of both breast cancer and ovarian cancer. This is because the genes that are mainly responsible for breast cancer are also linked to ovarian cancer.
