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'But now we have a treatment that has a striking effect on cancer cells and means it is likely many patients will live far longer, healthier lives.'ĭr Harries hopes pembrolizumab will prove even more effective when used alongside another emerging technology – a blood test being trialled at the Christie NHS Foundation Trust in Manchester that can spot tiny fragments of cancer DNA before it shows up on scans.įor most patients it is diagnosed at an early stage, and surgery to remove the affected area of skin and nearby tissue is an effective cure. 'Chemotherapy was pretty useless, so there was little we could do other than wait for the cancer to inevitably return. 'A few years ago there wasn't anything much we could do to prevent the cancer from coming back,' says Dr Mark Harries, consultant oncologist at Guy's and St Thomas' NHS Foundation Trust in London and chairman of the charity Melanoma Focus.
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Specialists say the drug, which works by blocking a molecule that helps cancer cells hide from the immune system, is just one example of the 'new frontier' in keeping skin cancer at bay for good. Previously only a small number of NHS patients could access pembrolizumab via the Cancer Drugs Fund, which covers the cost of experimental treatments from pharmaceutical companies, but the decision by health chiefs means thousands more will now benefit.