CA 15-3

If your CA 15-3 results are elevated, additional testing is needed to diagnose breast cancer. If the elevation is minimal, you may need to watch, wait, and order a repeat test 4-6 weeks later. The CA 15-3 elevations in non-cancerous conditions tend to be stable over time. If elevation persists or increases, you may need additional testing, such as breast ultrasound, mammography, or a CT scan