New Cancer-Detecting Blood Test , Is Accurate Enough, To Be Rolled Out, Study Suggests.br 'The Guardian' reports that a blood test capablebr of detecting over 50 types of cancer is accurate enough to be rolled out as a screening test.br 'The Guardian' reports that a blood test capablebr of detecting over 50 types of cancer is accurate enough to be rolled out as a screening test.br Scientists say the test can detect cancer br before any clinical signs or symptoms br of the disease emerge in a person. .br The test, developed by U.S.-based company Grail, is aimed at people with a higher risk of developing cancer, including patients aged 50 or older.br The findings, published in the journal br 'Annals of Oncology,' show that the test br accurately detects cancer while having br a very low false positive rate.br It works by looking at the DNA shed by tumors and left circulating in the blood. It focuses on chemical changes to DNA, known as methylation patterns.br Finding cancer early, when treatment is more likely to be successful, is one of the most significant opportunities we have to reduce the burden of cancer, Dr Eric Klein, chairman of the Glickman Urological br and Kidney Institute at Cleveland Clinic, br via 'The Guardian'.br Finding cancer early, when treatment is more likely to be successful, is one of the most significant opportunities we have to reduce the burden of cancer, Dr Eric Klein, chairman of the Glickman Urological br and Kidney Institute at Cleveland Clinic, br via 'The Guardian'.br These data suggest that, br if used alongside existing br screening tests, the multi-cancer br detection test could have br a profound impact on how br cancer is detected and, br ultimately, on public health, Dr Eric Klein, chairman of the Glickman Urological br and Kidney Institute at Cleveland Clinic, br via 'The Guardian'.br These data suggest that, br if used alongside existing br screening tests, the multi-cancer br detection test could have br a profound impact on how br cancer is detected and, br ultimately, on public health, Dr Eric Klein, chairman of the Glickman Urological br and Kidney Institute at Cleveland Clinic, br via 'The Guardian'.