CA 15-3

Cancer Antigen 15-3 MUC1
Serum (SST) kU/L (U/mL)

About this test

Mucin used in monitoring breast cancer treatment response and detecting recurrence. Not sufficiently sensitive for early detection.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs < 30 Upper limit; markedly raised with metastatic disease

Clinical Interpretation

High / Increased
Metastatic breast cancer (monitoring), less commonly ovarian or lung cancer. Benign: hepatic disease, SLE.

Related Tests

Specimen
Serum (SST)
Reporting Unit
kU/L (U/mL)

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.