ARUP's Laboratory Test Directory
| 0080461: Cancer Antigen-GI (CA 19-9) |
| Test Mnemonic: CA-GI | |
|
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, frozen. (Min: 0.4 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.4 mL serum or plasma, frozen. Remarks: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP. Unacceptable Conditions: Specimens collected in sodium citrate. Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 5 days; Frozen: 3 months |
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| Reference Interval: |
| 0-37 U/mL |
| Interpretive Data: | |
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The Roche Modular E170 CA 19-9 electrochemiluminescent immunoassay is used. Results obtained with different assay methods or kits cannot be used interchangeably. CA 19-9 is useful in monitoring pancreatic, hepatobiliary, gastric, hepatocellular, and colorectal cancer. The CA 19-9 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): | |
| 86301 |