08/29/2021
Early detection is the only truly effective approach for reducing mortality from cancer. Recently, a new technology called the GRAIL blood test can detect up to 50 types of cancer with a near 90% accuracy, using cell free DNA (cDNA) fragments detected in blood.
The test is very promising because it has a moderate test sensitivity with a high specificity. The moderate sensitivity means a person may have a positive test when the person actually has cancer. The specificity means there is a negative result and the person truly does not have cancer.
There is some work needed to improve sensitivity before the test is released for general use.
Source: Peter Attia, MD (Podcast)