ARUP's Laboratory Test Directory
| 0080464: Cancer Antigen-Breast (CA 15-3) |
| Test Mnemonic: CA-BREAST | |
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Methodology: Electrochemiluminescent Immunoassay
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
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Collect: One 4 mL SST or PST. Also acceptable: green (sodium or lithium heparin), lavender (EDTA), or pink (K2EDTA).
Transport: 1 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.2 mL serum or plasma at 2-8°C. Remarks: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP. Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 5 days; Frozen: 3 months |
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| Reference Interval: |
| 0-31 U/mL |
| Interpretive Data: | |
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The Roche Modular E170 CA 15-3 electrochemiluminescent immunoassay is used. Results obtained with different methods or kits cannot be used interchangeably. The CA 15-3 assay is used to aid in the management of Stage II and III breast cancer patients. Serial testing for patient CA 15-3 assay values should be used in conjunction with other clinical methods for monitoring breast cancer. Patients with confirmed breast carcinoma frequently have CA 15-3 assay values in the same range as healthy individuals. Elevations may be observed in patients with nonmalignant disease. For these reasons, a CA 15-3 assay value, regardless of level, should not be interpreted as absolute evidence of the presence or absence of malignant disease.
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| CPT Code(s): | |
| 86300 |