Ovarian Cancer
CA 125
This test measures the amount of the protein CA 125 (cancer antigen 125) in the blood. The test may be used to look for early signs of ovarian cancer.
Breast Cancer
CA 15-3
Cancer Antigen 15.3 is a protein that is elevated in the blood in some people with breast cancer.
Pancreatic Cancer
CA 19.9
Cancer antigen 19.9 is a protein that exists on the surface of certain cancer cells. High levels of CA 19.9 are often a sign of pancreatic cancer.