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CEA, Peritoneal Fluid
Test Code17421
CPT Codes
82378
Preferred Specimen
3 mL peritoneal fluid in sterile, leak-proof transport tube
Minimum Volume
2 mL
Transport Temperature
Frozen
Specimen Stability
Room temperature: 7 days
Refrigerated: 28 days
Frozen: 28 days
Refrigerated: 28 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Pancreatic fluid
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Tues-Sat; Report available: 1-2 days
Reference Range
<2.0 ng/mL
Clinical Significance
CEA is a tumor marker that is useful to monitor patients with persistent, or for recurrent or metastatic colonic carcinoma. As many as 30% of patients with breast, lung, hepatocellular, and pancreatic carcinoma also have elevated concentrations of CEA. Individuals who smoke may have a slightly higher baseline than non-smokers.