homovanillic acid

ho·mo·va·nil·lic ac·id (HVA),

(hō'mō-vă-nil'ik as'id),

4-Hydroxy-3-methoxyphenylacetic acid; a phenol found in human urine; produced through the methylation of homoprotocatechuic acid on the meta-OH group. It is the principal urinary metabolite of dopa and dopamine.

homovanillic acid

/ho·mo·va·nil·lic ac·id/ (ho″mo-vah-nil´ik) a major terminal urinary metabolite, converted from dopa, dopamine, and norepinephrine.

homovanillic acid (HVA)

[hō′mōvənil′ik]

an acid that is produced by the normal metabolism of dopamine and that may occur at an elevated level in urine in association with tumors of the adrenal gland. Its normal accumulation in a 24-hour collection urine sample is 15 mg.

homovanillic acid

HVA Physiology A major dopamine metabolite used to synthesize epinephrine and norepinephrine and excreted in urine; HVA is usually measured with the major catecholamines and other catecholamine metabolites; HVA is ↑ in neuroblastoma and ganglioneuroma Ref range 0-15 mg/24 hr urine. See Hypertension, Pheochromocytoma.

ho·mo·va·nil·lic ac·id

(HVA) (hō'mō-vă-nil'ik as'id)

A phenol found in human urine; produced through the methylation of homoprotocatechuic acid on the meta-OH group.

ho·mo·va·nil·lic ac·id

(HVA) (hō'mō-vă-nil'ik as'id)

A phenol found in human urine.

homovanillic acid (hō´mōvənil´ik),

n an acid that is produced by normal metabolism of dopamine and may be elevated in the urine in association with tumors of the adrenal gland.