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Also reported in: kU/L
Your CA 15-3 is in the normal range. Mild elevation can occur with benign breast disease, liver disease, and other non-malignant conditions.
Your CA 15-3 level is undetectable. This is the best possible baseline result and is most relevant for monitoring breast cancer treatment response.
No action needed. If undergoing breast cancer treatment monitoring, this is an excellent response marker result.
CA 15-3 undetectable — no detectable markerYour CA 15-3 is within the normal reference range. CA 15-3 is primarily used for monitoring breast cancer treatment and detecting recurrence, not for initial diagnosis. A normal result is reassuring.
No action needed. Standard breast cancer screening (mammography) per age-appropriate guidelines should continue.
CA 15-3 within normal reference range — no elevated breast cancer markerYour CA 15-3 is in the low-normal range. This is a favorable baseline result.
No action needed.
CA 15-3: low-normal — favorable baselineYour CA 15-3 is in the normal range. Mild elevation can occur with benign breast disease, liver disease, and other non-malignant conditions.
No specific action required. Continue standard breast health monitoring.
CA 15-3 within reference rangeYour CA 15-3 is in the optimal range, which is a very reassuring baseline for breast health and cancer monitoring.
No action needed.
CA 15-3: optimal — very low marker levelYour CA 15-3 is above the reference range. Mild elevation can result from breast cancer but also from benign breast disease, liver conditions, and other cancers. In patients undergoing breast cancer treatment, a rising CA 15-3 may indicate disease progression.
Discuss with your doctor or oncologist. Clinical breast exam, imaging, and context-dependent evaluation are needed. Trend monitoring is important.
CA 15-3 30–50 U/mL — borderline elevated; investigation warrantedYour CA 15-3 is significantly elevated. At this level, the concern for active breast cancer, recurrence, or metastatic disease increases. Benign conditions less commonly cause this degree of elevation.
Seek prompt oncology evaluation. Imaging studies (CT, bone scan, or PET-CT) may be indicated to assess for disease recurrence or progression.
CA 15-3 >50 U/mL — significantly elevated; breast cancer recurrence or progression possibleYour CA 15-3 is critically elevated. This level is strongly associated with active metastatic breast cancer or significant tumor burden. Urgent oncological evaluation and re-staging are required.
Seek urgent specialist oncology evaluation immediately. Comprehensive re-staging imaging and biopsy planning should be initiated without delay.
CA 15-3 >150 U/mL — critically elevated; active metastatic breast cancer likelyUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.