What type of cancer can the CA125 test help screen for?

The CA125 test is primarily used as a tumor marker for ovarian cancer. This test measures the level of the protein CA125 in the blood, which can be elevated in women who have ovarian cancer. While CA125 is not exclusively used for diagnostic purposes, it can help in monitoring treatment response and detecting recurrence in patients already diagnosed with ovarian cancer. Because of its association with ovarian cancer, the correct choice highlights the test's significance in this specific context, making it a valuable tool in managing and understanding the disease.