If you’re wondering why I had this done at age 36, it was actually because I had a few concerning symptoms. Thankfully, I received a clean bill of health. However, had I not had symptoms, I still would have opted for a screening colonoscopy in four years from now when I’ll turn 40.
There are several different companies now offering Multi-Cancer Early detection tests. The test I am writing about today is the Galleri test by GRAIL. This test works by looking for methylation patterns on cell-free DNA in blood samples. The test generates one of two possible results: “Cancer Signal Detected,” or “Cancer Signal Not Detected.”