Blood test 'can check for more than 50 types of cancer'
Trial data suggests it is better at detecting more advanced disease rather than the beginnings of cancer, which may limit how useful it becomes.The test looks for telltale chemical changes to bits of genetic code - cell-free DNA - that leak from tumours into the bloodstream.
"But before this blood test is used routinely, we will probably need to see results from clinical studies like this to more fully understand the test performance.
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