The Galleri test revealed the correct site of a tumour 85% of the time in a study with 5,000 patients.
The test correctly revealed two out of every three cancers among 5,000 people who had visited their GP with suspected symptoms, in England or Wales.The Galleri test looks for distinct changes in bits of genetic code that leak from different cancers. Spotting treatable cancer early can save lives.The test remains very much a "work in progress", the researchers, from Oxford University, say, but could increase the number of cancers identified.
More than 350 of those in the study - the biggest of its kind in patients with suspected cancer symptoms - were subsequently diagnosed with cancer, using traditional methods such as scans and biopsies. About:2.5% of those testing negative were found to have cancer "The test was 85% accurate in detecting the source of the cancer - and that can be really helpful because so many times it is not immediately obvious when you have got the patient in front of you what test is needed to see whether their symptoms are down to cancer," he said.
The NHS has also been using the Galleri test, developed by Californian company Grail, in thousands of people without symptoms, to see if it can detect hidden cancers.
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