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Test Code SQ SERONM, EPIC LAB121 Serotonin, Blood

Additional Codes

Mayo Test ID
SERWB

Reporting Name

Serotonin, B

Useful For

In conjunction with, or as an alternative to first-order test in the differential diagnosis of isolated symptoms suggestive of carcinoid syndrome, in particular flushing (5-HIAA or serum chromogranin A measurements are first-line tests)

 

Second-order test in the follow-up of patients with known or treated carcinoid tumors in whole blood specimens

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Whole Blood EDTA


Specimen Required


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.


Specimen Minimum Volume

1.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Whole Blood EDTA Frozen (preferred) 90 days
  Refrigerated  24 hours

Reference Values

≤330 ng/mL

Day(s) and Time(s) Performed

Monday, Wednesday, Friday; 10 a.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

84260

LOINC Code Information

Test ID Test Order Name Order LOINC Value
SERWB Serotonin, B 2939-7

 

Result ID Test Result Name Result LOINC Value
84373 Serotonin, B 2939-7

Reject Due To

Hemolysis

NA

Lipemia

Mild OK; Gross OK

Icterus

Mild OK; Gross OK

Other

NA

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Forms

If not ordering electronically, complete, print, and send an Oncology Test Request Form (T729) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/oncology-request-form.pdf)