One in every nine women in the UK will develop breast cancer at some point in her life – more than 41,000 cases are diagnosed each year.
It has become the most common cancer in the UK, and is the leading cause of death for women aged 34 to 54.
More rarely, men can also develop this cancer.
Despite recent improvements in the mortality rates, due to better treatments and earlier detection, the UK still has one of the highest mortality rates in the world.
But research is beginning to reap dividends in new ways of understanding how breast cancer cells work।