3-methoxy-4-hydroxymandelic acid

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.
References in periodicals archive ?
Zucker et al., "Urinary excretion of 3-methoxy-4-hydroxymandelic acid and 3-methoxy-4-hydroxyphenylacetic acid by 288 patients with neuroblastoma and related neural crest tumors," Cancer Res, vol.
Urinary excretion of 3-methoxy-4-hydroxymandelic acid and 3-methoxy-4-hydroxyphenyl acetic acid by 288 patients with neuroblastoma and related neural crest tumors.