Breast Cancer FAQs

Q. How common is breast cancer?

A. There are over 212,000 cases of breast cancer diagnosed in the USA each year. In Canada the figure is 20,500, Australia 13,000 and in the UK the figure is 41,000. Overall, one woman in every nine will get breast cancer at some time in her life.

Q. Who is most at risk?

A. Breast cancer is overwhelmingly a female disease, but about 1% of cases occur in men (around 300 per year in the UK). Amongst women it becomes more common as age increases. More than 80% of cases occur in women over 50. Taking the contraceptive pill slightly increases the risk. Taking hormone replacement therapy significantly increases your risk somewhat more, but the health benefits derived from hormone replacement are better overall. Obesity and heavy drinking also significantly increase the risk.

If one or more relatives have had breast cancer, this also increases your risk of developing it (see below).

Q. Does breast cancer run in families?

A. Having one close relative (mother or sister) with breast cancer doubles your risk of getting breast cancer, when compared to women with no cases in the family. Having two close relatives affected increases your risk further.

There are a very few families in which breast cancer is very common - ie four or more cases. Most of these families carry faulty versions of the 'BRCA' breast cancer genes. Women with a faulty BRCA gene have a 50% to 80% chance of getting breast cancer. Testing for faulty BRCA genes is available on the NHS.

Q. Is the use of deodorants linked to breast cancer?

A. There has been a persistent internet rumour that underarm deodorants cause breast cancer and even one or two newspaper articles that suggested this was backed up by research findings. However, there is no good evidence from cancer research to support this idea. On the contrary: in a large study comparing breast cancer patients and healthy women, there was no difference found at all in their use of underarm deodorants.

What are the symptoms of Breast Cancer?

Screening for breast cancer by mammography (X-raying the breast) is offered every three years in the UK to all women between 50 and 64. The highest number of cases of breast cancer occurs in women between these ages.

Mammography can detect very early breast tumours, when they are too small to be felt. In fact, most of the breast cancers detected by screening are at this very early stage, when they are relatively easy to cure. Studies have shown that women who take part in screening are more likely to have breast cancer diagnosed early and more likely to have it cured and, as a result, are less likely to die from it, than women who do not take part in mammography screening.

Another method of screening available to all women is to feel the breasts for any lumps. A guide on how to do this properly can be obtained at any doctor's surgery. Women should also check for the other main symptoms:

• Change in the size or shape of a breast
• Dimpling of the breast skin
• The nipple becoming inverted
• Swelling or a lump in the armpit