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:  
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

Reference Interval:
0-37 U/mL

Interpretive Data:
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. 



CPT Code(s):
86301

 

 

 
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