Description

Chromogranin A

Item# LC140848

Chromogranin A (CGA) is a protein found in and released from neuroendocrine cells. The CGA test is used as a tumor marker and may be ordered in combination with or in place of serotonin to help aid in the diagnosis of carcinoid syndrome. Typical carcinoid symptoms include:

• Flushing
• Diarrhea
• Abdominal pain
• Wheezing
• Valvular heart disease

Measurement of CGA is also useful as a tumor marker for adrenal tumors and small cell lung carcinoma. Elevated levels of CGA in patients with prostate cancer have been shown to correlate with poor prognosis.¹

Instructions

Fasting is not required for this test. Take all medications as prescribed.