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Scientists move one step closer to developing universal cancer test

25/01/2018

Developing a universal blood test for cancer has been one of the biggest goals in medicine ever and now scientists at John Hopkins University have taken a huge step towards achieving it. The team have trialled a test that can detect eight common forms of cancer, with the ultimate goal being to develop an annual test that can catch cancers early and save lives. While more work is needed, experts in the UK have described the breakthrough as “enormously exciting”. The test works by picking up on tiny traces of mutated DNA and proteins released into a person’s bloodstream by tumours. The CancerSEEK test, as it is known, looks for mutations in 16 genes and eight different proteins released by tumours. In a trial involving 1,005 patients with cancers in the stomach, liver, ovary, pancreas, colon, oesophagus, lung or breast, which had not yet spread to other tissues, the test was able to successfully detect 70% of the cancers. The test is particularly exciting as it was able to detect some cancers that currently have no early detection screening programmes. Pancreatic cancer is one area where the test could really make a big difference. At present, four in five pancreatic cancer patients die within the year they are diagnosed. That’s because the disease emits so few symptoms and sufferers are often diagnosed too late. The CancerSEEK test will now be trialled on individuals who have not been diagnosed with cancer. This will be the real measure of its effectiveness and usefulness.  

Simple blood test can detect cancer years before symptoms appear

08/06/2017

A simple blood test that accurately detects several different types of cancer years before symptoms even appear could revolutionise how the disease is treated, scientists have said. Researchers hope the non-invasive test will pave the way for a future where the straightforward procedure could form part of routine health check-ups. It’s thought that thousands of deaths each year could be prevented with the tests as they can detect tumours at an early stage, when treatment is most effective. At present, the best method for detecting cancer is a biopsy, which involves cutting out a small piece of tumour tissue for lab analysis. However, biopsies are invasive and often painful, and a person already needs to have a tumour or at least a suspected tumour to have something cut out of it. That’s why scientists have been working to develop blood tests that can do the same, without the need for surgery. Speaking about the breakthrough, Dr Bert Vogelstein, a professor of oncology at Johns Hopkins School of Medicine, told The Guardian: “It’s fair to say that if you could detect all cancers while they are still localized, you could diminish cancer deaths by 90 per cent.”

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