The Galleri test looks for a unique “fingerprint” of cancer by analyzing methylation patterns of cell-free DNA (cfDNA).If detected, the test predicts the most likely origin of the cancer signal, to help guide the diagnostic workup.

The Galleri test is a screening test and does not diagnose cancer. Diagnostic testing is needed to confirm cancer. The Galleri test identifies DNA in the bloodstream shed by cancer cells and does not predict future genetic risk for cancer. It should be used in addition to healthcare provider recommended screening tests.