<prompt> All of the following may be raised in carcinoid syndrome, Except5HIAA5HT5HTPVMA  <response>: 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. 