Breast cancer is the most common cancer in the UK, but there are several types of breast cancer; it is not one single disease.
It can be diagnosed at different stages of development and can grow at different rates. Breast cancer is also a complex disease and it is difficult to predict what course it will take in each person.
Most cases are in women but men can be diagnosed with breast cancer too, although this is rare.
It can be very difficult to take everything in when you first hear you have cancer. You may need help to get the facts straight and to ask the questions that are important to you.
This 'About breast cancer' section of our website provides information on the different types of breast cancer and explains how they may be treated.
If you have any questions, please remember that we offer a range of free services for people affected by breast cancer. From diagnosis, through treatment and beyond, our services are here every step of the way.
Content updated December 2013. Next planned review 2015