Liquid biopsy trial fail
Implosion of Grail’s Galleri Cancer Screening Test? https://tinyurl.com/3extfeuh One of the major goals in cancer research is to develop means of early diagnosis for cancers which typi cally present at an advanced stage , such as ovarian cancer. The G rail cancer screening test is one such attempt. Using circulating tumour DNA as a marker of disease, the test seeks to identify cancer early to improve survival . This test has been applied over the last three years in the Galleri Clinical Trial in the UK. The prospective trial has 142000 participants aged between 50 and 7 7, with possible expansion to one million and is administered by the NHS . The key endpoint is reduction in numbers of cancers presenting on diagnosis as stage 3 or 4, with a later stated goal of fewer than 20% of cancers presenting at stage 4 . The trial was controversial with complaints of poor use of limited resources an d possible bias . However, political pressure in the form of honouring a...