CA 19-9 (GI)
Test:
332
CPT:
86301
Synonyms
Carbohydrate Antigen (CA) 19-9, CA 19-9
Special Instructions
Values obtained with different assay methodologies should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor a patient’s course of therapy. This procedure does not provide serial monitoring; it is intended for one-time use only
Expected Turnaround Time
Within 1 day
Specimen Requirements
Specimen
Within 1 day
Volume
1 mL
Minimum Volume
0.7 mL (Note: This volume does not allow for repeat testing.)
Container
Gel-barrier tube (preferred) or red-top tube
Collection
If a red-top tube is used, transfer separated serum to a plastic transport tube.
Storage Instructions
Room temperature
Causes for Rejection
Citrate plasma specimen; improper labeling
Test Details
Use
Monitor gastrointestinal, pancreatic, liver, and colorectal malignancies