| Test Name: |
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Carcinoembryonic Antigen (CEA)
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| Test Code(s): |
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CEA
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| CPT Code(s): |
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82378
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| Methodology: |
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Chemiluminescent Immunoassay
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| Days Performed: |
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Mon-Fri, dayshift.
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| Turnaround Time: |
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Stat: Not available stat.
Routine: Next working day.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Container: |
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Preferred: Red cap with yellow ring (SST)
Also Acceptable:
Red top
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| Collection Volume: |
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Preferred: 1 mL
Pediatrics: 0.5 mL
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| Sample Analyzed: |
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Serum
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| Volume Required: |
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Preferred: 0.5 mL
Pediatrics: 0.15 mL
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| Specimen Processing: |
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Centrifuge. If a complete barrier has not formed, transfer cell-free serum to plastic vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Ambient: 8 hours
Refrigerated: 48 hours
Frozen: Freeze if sample will not be assayed within 48 hours.
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Interpretation
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Reference Interval:
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0 days and up: 0.0 - 3.0 ng/mL
CEA levels in smokers may be as high as 8.0 ng/mL or higher.
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| Test Limitations: |
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Results may be affected if patient has developed heterophilic antibodies due to exposure to animal based protein.
A high dose hook effect is not seen in results up to >100,000 ng/mL.
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| Additional Information: |
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The Siemens ADVIA Centaur method is used. Results obtained with different assay methods or kits cannot be used interchangeably.
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