Cancer Antigen 19-9

Overview

  • EPIC Code:
  • IMO407
  • Soft Test Code:
  • CA199
Alternate Names
  • CA 19-9
  • Carbohydrate Antigen 19-9
Clinical Significance

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.


Specimen Collection & Preparation

Patient Preparation

Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.


Specimen Requirements

1.0 mL Serum in a SST Gold Top Tube

Alternate Specimen

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 

TransportAndStorage

8 hours Ambient
48 hours Refrigerated

Collection Instructions

 

Clinical Interpretation

Reference Range:

CA 19-9: <35 U/mL


Test Comments:

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.


Methodology:
  • Immunochemiluminometric Assay

Clinical Significance

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.


Production Schedule

Sites Performed
  • Parkview Regional Medical Center
Days Performed
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Departments
  • Chemistry

Coding & Compliance

CDM

01428705


CPT Coding

86301


Medical Necessity May Apply