ARUP's Laboratory Test Directory

Cancer Antigen-GI (CA 19-9) : 0080461

Mnemonic: CA-GI

Methodology: Electrochemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL serum separator tube or plasma separator tube. Also acceptable: green (sodium or lithium heparin), lavender (EDTA), or pink (K2EDTA).

Transport:  1 mL serum or plasma, frozen. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

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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