A large percent of patients with gastrointestinal tumors (such as pancreative, liver, gastric, colorectal tumors) and some other malignancies have been shown to have elevated serum or plasma CA 19-9 levels may be useful for monitoring disease activity predicitng replaps following treatment. CA 19-9 should not be used as a screening test.
Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
1.0 mL Serum in a SST Gold Top Tube
1.0 mL Serum from a Red Top Tube in a Plastic Vial
Unacceptable sample types for this test are Amniotic fluid, synovial fluid, cyst/pancreatic cyst fluid, pericardial fluid, and vitreous fluid
8 hours Ambient
48 hours Refrigerated
0.5 mL
CA 19-9: <35 U/mL
This test was performed using the Roche Cobas 8000. Values obtained with different assay methods cannot be used interchangeably, because the concentration of CA 19-9 in any given specimen can vary, due to differences in assay methods and reagent specificity. Serum CA 19-9 levels, regardless of value, should not be interpreted as absolute evidence of the presence or absence of malignant disease.
Patients taking vitamin supplements containing doses of >5 mg/day may have falsely decreased test results generated.
A large percent of patients with gastrointestinal tumors (such as pancreative, liver, gastric, colorectal tumors) and some other malignancies have been shown to have elevated serum or plasma CA 19-9 levels may be useful for monitoring disease activity predicitng replaps following treatment. CA 19-9 should not be used as a screening test.
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