Dr Hilary Jones spoke on Good Morning Britain on Thursday about the news Girls Aloud star Sarah Harding is fighting cancer.
She revealed in an Instagram post on Wednesday that she was diagnosed with breast cancer earlier in the year, and recently discovered it had spread to other parts of her body.
Hilary said it was rare for a woman of Sarah's age of 38 to be diagnosed, and said the cancer may have spread fast without any obvious signs or lumps.
Speaking to hosts Ranvir Singh and Sean Fletcher, Hilary said: "The success rate and the outcomes for breast cancer have increased dramatically in the last 40 years. "So that's really good news, we have got better treatment, we have got earlier diagnosis through screening, self-checking, so
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