Laboratory Medicine Program

Chromogranin A
(CGA)

Clinical Decription:
Chromogranin A is a protein present in the chromaffin granules of neuroendocrine cells. Chromogranin A is elevated in most patients with symptomatic or advanced neuroendocrine tumors. There is no universal calibration standard for chromogranin assays. Therefore, different antibody combinations contained in different kits do not produce comparable results. Serial monitoring should be performed with the same assays.
<br/><em>Thermo Scientific BRAHMS CgA II Kryptor</em>

Method: Fluorescent Immunoassay; B.R.A.H.M.S. Kryptor

Component Tests Used: n/a

Reference Ranges Used:
<77 ng/mL

Specimen Type: Plasma from an EDTA plastic tube
Collected In: EDTA
Volume: 3 mL (minimum: 1 mL)

Shipping: frozen plasma

Special Instructions: Patients should be fasting for 12 hours and discontinue proton pump inhibitor medications for 2 weeks prior to sample collection. Spin and separate within 4 hours of collection. Freeze immediately.

Testing Schedule(s): Please call

Turnaround Time: 7 days

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For more information, call 416.340.5227 or 1.866.865.5227

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