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Test ID CGAK Chromogranin A, Serum

Useful For

Follow-up or surveillance of patients with known or treated carcinoid tumors

 

An adjunct in the diagnosis of carcinoid tumors

 

An adjunct in the diagnosis of other neuroendocrine tumors, including pheochromocytomas, medullary thyroid carcinomas, functioning and nonfunctioning islet cell and gastrointestinal amine precursor uptake and decarboxylation tumors, and pituitary adenomas

 

A possible adjunct in outcome prediction and follow-up in advanced prostate cancer

Method Name

Immunofluorescent Assay (IFA)

Reporting Name

Chromogranin A, S

Specimen Type

Serum


Specimen Required


Patient Preparation: Proton pump inhibitor medications should be discontinued for at least 2 weeks before collection.

Supplies: Aliquot Tube, 5 mL (T465)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Information: Centrifuge and aliquot serum into plastic vial. Do not submit in original tube.


Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen (preferred) 90 days
  Ambient  7 days
  Refrigerated  24 hours

Reference Values

<93 ng/mL

Reference values apply to all ages.

Day(s) and Time(s) Performed

Monday through Friday; 8 a.m.-2 p.m.

Saturday; 8 a.m.-1 p.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

86316

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CGAK Chromogranin A, S 9811-1

 

Result ID Test Result Name Result LOINC Value
CGAK Chromogranin A, S 9811-1

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.

NY State Approved

Yes

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Oncology Test Request (T729)