Web: | mayocliniclabs.com |
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Email: | mcl@mayo.edu |
Telephone: | 800-533-1710 |
International: | +1 855-379-3115 |
Values are valid only on day of printing. |
First-line testing for the diagnosis of carcinoid tumors with symptoms suggestive of carcinoid syndrome consists of urinary serotonin (SERU / Serotonin, 24 Hour, Urine), urinary 5-HIAA (HIAA / 5-Hydroxyindoleacetic Acid [5-HIAA], 24 Hour, Urine), and serum chromogranin A (CGAK / Chromogranin A, Serum).
Supplies: Serotonin Tube (T259)
Collection Container/Tube: Lavender top (EDTA)
Submission Container/Tube: Serotonin tube (T259) containing ascorbic acid
Specimen Volume: 2.5 mL
Collection Instructions:
1. Immediately after the venipuncture, transfer approximately 2.5 mL of whole blood to serotonin tube and mix well (any volume of whole blood from 1.5-3 mL is acceptable).
2. Immediately freeze specimen (necessary to lyse the RBCs).
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.
Gross lipemia | OK |
Gross icterus | OK |
Specimen Type | Temperature | Time | Special Container |
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Whole Blood EDTA | Frozen | 90 days | SEROTONIN TUBE |