A member asked:

What will a serotonin blood test show?

A doctor has provided 1 answer

Serotonin levels.: This measures the amount of serotonin in your body. Higher than normal levels may mean carcinoid syndrome. The normal range is 101-283 ng/ml. This has a triad of cutaneous flushing, diarrhea, and valvular heart disease, and occurs in 5% of patients with carcinoid tumors. This is important since patients with this syndrome have a 2.5 year median survival from the first episode of flushing.

Answered 12/10/2019

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