Dr Hilary Jones has said Sarah Harding's cancer is "uncommon" and "may have spread fast". Sarah, 38, made the devastating announcement that she was diagnosed with breast cancer which has spread to other parts of her body in an emotional statement on Wednesday.
Good Morning Britain's resident doctor has now discussed the disease, saying it is rare for somebody of Sarah's age to be diagnosed.
Speaking to hosts of the ITV breakfast show, Sean Fletcher and Ranvir Singh, about the Girls Aloud singer's illness, he said: "The success rate and the outcomes for breast cancer have increased dramatically in the last 40 years.
Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter. You can sign up at.
Read more on ok.co.uk