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HelpTest ID PF199 Carbohydrate Antigen 19-9 (CA 19-9), Pleural Fluid
Useful For
An adjuvant to cytology and imaging studies to differentiate between nonmalignant and malignant causes of pleural effusions
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Pleural FluidSpecimen 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).
Source: Pleural fluid, thoracentesis fluid
Container/Tube: Plain, plastic, screw-top tube
Specimen Volume: 2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Pleural Fluid | Frozen (preferred) | 90 days |
| Refrigerated | 14 days | |
| Ambient | 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 icterus | OK |
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.