Cancer Antigen-GI (CA 19-9)
| Abbrev Code: | CA19 | ||
| Order Code: | LAB3347 | Order Name: | Cancer Antigen 19-9 |
| Synonyms: | CA 19-9, Tumor Marker | ||
| Methodology: | Electrochemiluminescent immunoassay | ||
| CPT Codes: | 86301 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Sun-Sat; results are reported within 1-3 days. | ||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2 mL |
| Minimum\Peds Volume: | 1.2 mL |
| Container: | Red or gold (gel) Alternate Containers: Green (lithium heparin, gel), Green (sodium heparin, no gel), Purple (EDTA), Red (no gel) |
| Causes for Rejection: | Body fluids. Collected in sodium citrate. |
Processing and Shipping
| Specimen Processing: | Centrifuge and aliquot within 2 hours of collection 1 mL, 0.5 mL minimum. Store in refrigerator. |
| Shipping Instructions: | Ship at refrigerated temperature. |
| Stability: | After separation from cells: Samples are stable for 5 days at room temperature; 2 weeks refrigerated and 3 months frozen. |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 80461 |
Interpretive
| Reference Range: | 0-37 U/mL |
| Use: | The Roche Modular E170 CA 125 electrochemiluminescent assay 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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