Cancer Antigen (CA) 15-3 (CA 15-3)
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| Synonyms:
| CA 15-3 |
| Specimen: | Blood; (1) SST (serum separator) or Red (no preservative) top vacutainer tube. |
| Volume: | Full primary tube |
| Minimum Volume: | 0.5 mL (Note: This volume does not allow for repeat testing.) |
| Collection: | If tube other than an SST is collected, transfer serum to a tightly capped plastic aliquot tube within 2 hours of collection for transport.
Refrigerate at 2-8°C.
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| Rejection Criteria: | Incorrect specimen type; improper labeling. |
| Reference Range: | 0.0-25.0 units/mL |
| Methodology: | Electrochemiluminescence immunoassay (ECLIA) |
| Test Use: | Quantitative measurement of cancer antigen 15-3 |
| Additional Information: | The CA 15-3 assay value, regardless of level, should not be interpreted as absolute evidence for the presence or absence of malignant disease. |
| Testing Includes: | Specimen sent to LabCorp. LabCorp test # 143404. |
| Testing Facility: | LabCorp |