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HelpTest ID 199PT Carbohydrate Antigen 19-9 (CA 19-9), Peritoneal Fluid
Useful For
An adjunct to cytology to differentiate between malignancy-related ascites and benign causes of ascites formation
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
PeritonealSpecimen Required
Patient Preparation: For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Sources: Peritoneal, abdominal, ascites, paracentesis fluid (peritoneal washings are not acceptable)
Container/Tube: Plain, plastic, screw-top tube
Specimen Volume: 2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Peritoneal | Frozen (preferred) | 90 days |
| Ambient | 7 days | |
| Refrigerated | 7 days |
Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday through Saturday
CPT Code Information
86301
Report Available
1 to 3 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.