vanillylmandelic acid


vanillylmandelic acid

 [vah-nil″il-man-del´-ik] VMA; the primary end-product of catecholamine metabolism excreted in the urine. Urinary VMA levels are used in screening patients for pheochromocytoma.

va·nil·lyl·man·del·ic ac·id (VMA),

(vă-nil'il-man-del'ik as'id), Misnomer for 4-hydroxy-3-methoxymandelic acid (α,3-dihydroxy-2-methoxybenzeneacetic acid); the major urinary metabolite of adrenal and sympathetic catecholamines (for example, from both epinephrine and norepinephrine); elevated in most patients with pheochromocytoma.

va·nil·lyl·man·del·ic ac·id

(VMA) (vă-nil'il-man-del'ik as'id) The major urinary metabolite of adrenal and sympathetic catecholamines; elevated in most patients with pheochromocytoma.