Cancer Antigen-GI (CA 19-9)


Sunquest Code:CA19  
Epic Code:LAB3347Epic Name:Cancer Antigen 19-9
Synonyms:CA 19-9, Tumor Marker
Methodology:Electrochemiluminescent immunoassay
Turnaround Time:Specimens are sent to reference laboratory Mon-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) (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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