How are carcinoid tumors diagnosed?

Updated: Feb 12, 2019
  • Author: Cameron K Tebbi, MD; Chief Editor: Max J Coppes, MD, PhD, MBA  more...
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Laboratory diagnosis of carcinoid tumors depends on the identification of the characteristic biomarkers of the disease. [20, 21, 22] Measurement of biogenic amine levels (eg, serotonin, 5-hydroxyindoleacetic acid [5-HIAA], chromographin-A, catecholamines, histamine) and its metabolites in the platelets, plasma, and urine of patients can be helpful in making the diagnosis.

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