Item Catalog Number: LC140848
Chromogranin A (CGA) is a protein found in and released from neuroendocrine cells. The Chromogranin A test is used as a tumor marker. It may be ordered in combination with or in place of serotonin to help as an aid to diagnose carcinoid syndrome. Typical carcinoid symptoms include:
- Abdominal pain
- Valvular heart disease
Measurement of Chromogranin A is also useful as a tumor marker for adrenal tumors as well as small cell lung carcinoma. Elevated levels of Chromogranin A in patients with prostate cancer have been shown to correlate with poor prognosis.1
Fasting is not required. Take all medications as prescribed.
1. Berruti A, Dogliotti L, Mosca A, et al, “Circulating Neuroendocrine Markers in Patients With Prostate Carcinoma,” Cancer, 2000, 88(11):2590-7.PubMed 10861438