Trisha Goddard, 66, reveals her breast cancer has returned and is incurable as she speaks out to fre
Breast cancer is one of the most common cancers in the world. Each year in the UK there are more than 55,000 new cases, and the disease claims the lives of 11,500 women. In the US, it strikes 266,000 each year and kills 40,000.But what causes it and how can it be treated?