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Breast cancer is the most common type of cancer in the UK. Most women diagnosed with breast cancer are over 50, but younger women can also get breast cancer.
About one in eight women are diagnosed with breast cancer during their lifetime. There's a good chance of recovery if it's detected in its early stages.
For this reason, it's vital that women check their breasts regularly for any changes and always get any changes examined by their GP.
In rare cases, men can also be diagnosed with breast cancer. Read about breast cancer in men.
This topic covers:
Breast cancer can have a number of symptoms, but the first noticeable symptom is usually a lump or area of thickened breast tissue.
Most breast lumps aren't cancerous, but it's always best to have them checked by your doctor.
You should also see your GP if you notice any of the following:
Breast pain is not a symptom of breast cancer.
Read more about the symptoms of breast cancer.
The exact causes of breast cancer aren't fully understood. However, there are certain factors known to increase the risk of breast cancer.
Read more about the causes of breast cancer.
After examining your breasts, your GP may refer you to a specialist breast cancer clinic for further tests. This might include breast screening (mammography) or a biopsy.
Read about how breast cancer is diagnosed.
There are several different types of breast cancer, which can develop in different parts of the breast.
Breast cancer is often divided into:
Other less common types of breast cancer include:
It's possible for breast cancer to spread to other parts of the body, usually through the bloodstream or the axillary lymph nodes. These are small lymphatic glands that filter bacteria and cells from the mammary gland.
If this happens, it's known as secondary, or metastatic, breast cancer.
Mammographic screening, where X-ray images of the breast are taken, is the most commonly available method of detecting an early breast lesion.
However, you should be aware that a mammogram might fail to detect some breast cancers.
It might also increase your chances of having extra tests and interventions, including surgery, even if you're not affected by breast cancer.
Women with 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 who are 50 to 70 years old are invited for breast cancer screening every three years.
Women over the age of 70 are also entitled to screening and can arrange an appointment through their GP or local screening unit.
The NHS is in the process of extending the programme as a trial, offering screening to some women aged 47 to 73.
Read about breast screening.
If cancer is detected at an early stage, it can be treated before it spreads to nearby parts of the body.
Breast cancer is treated using a combination of:
Surgery is usually the first type of treatment you'll have, followed by chemotherapy or radiotherapy or, in some cases, hormone or biological treatments.
The type of surgery and the treatment you have afterwards will depend on the type of breast cancer you have. Your doctor will discuss the best treatment plan with you.
In a small proportion of women, breast cancer is discovered after it's spread to other parts of the body (metastatic breast cancer).
Secondary cancer, also called advanced or metastatic cancer, isn't curable, so the aim of treatment is to achieve remission (symptom relief).
Read about treating breast cancer.
Being diagnosed with breast cancer can affect daily life in many ways, depending on what stage it's at and the treatment you're having.
How women cope with their diagnosis and treatment varies from person to person. You can be reassured that there are several forms of support available, if you need it.
Read about living with breast cancer.
As the causes of breast cancer aren't fully understood, at the moment it's not possible to know if it can be prevented.
If you're at increased risk of developing the condition, some treatments are available to reduce the risk.
Studies have looked at the link between breast cancer and diet. Although there are no definite conclusions, there are benefits for women who:
It's been suggested that regular exercise can reduce your risk of breast cancer by as much as a third. Regular exercise and a healthy lifestyle can also improve the outlook for people affected by breast cancer.
If you've been through the menopause, it's particularly important that you're not overweight or obese.
This is because being overweight or obese causes more oestrogen to be produced, which can increase the risk of breast cancer.
Read about preventing breast cancer.