CA 15.3

The CA 15-3 test measures the level of cancer antigen 15-3 in the blood, which is a protein produced by certain types of cancer cells, particularly breast cancer cells. This test is used to monitor the treatment of breast cancer, detect recurrences, and assess the progression of the disease. Elevated CA 15-3 levels can indicate the presence of breast cancer or other conditions, such as liver disease and benign breast disorders. The CA 15-3 test is valuable for guiding treatment decisions, evaluating the effectiveness of therapy, and monitoring for cancer recurrence in patients with breast cancer.