All of the following may be raised in carcinoid syndrome, Except
Correct Answer: VMA
Description: Answer is D (VMA): 5HIAA, 5HT, 5HTP are metabolites of Trvptophan / Serotonin that may be elevated in carcinoid tumors. Vanillvl mandilic acid (VMA) is the principal metabolite of catecholamines secreted by adrenal medulla. Elevated VMA levels in urine is a feature of increased catecholamine secreting tumors, typically pheochromocytomas (and not carcinoid tumors).
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