Home › Categories › Clinical Biochemistry › Chromogranin A

Chromogranin A

CgA
Serum (SST, fasting; avoid PPI 2 weeks before) µg/L

About this test

Protein co-stored and co-released with neurotransmitters and peptide hormones from neuroendocrine cells. Broad marker for neuroendocrine tumours (NETs).

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs < 100 Lab and assay dependent; consult local reference range

Clinical Interpretation

High / Increased
Neuroendocrine tumours (carcinoid, phaeochromocytoma, gastrinoma, insulinoma, pituitary), renal failure, atrophic gastritis, PPI use.
Specimen
Serum (SST, fasting; avoid PPI 2 weeks before)
Reporting Unit
µg/L
Category
🧪 Clinical Biochemistry

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.