2024年5月13日 · The VMA Test (Vanillylmandelic Acid test) is a laboratory test that measures the levels of VMA in a person’s urine. VMA is a metabolite of catecholamines, which are hormones produced by the adrenal glands. The test is primarily used as a diagnostic tool for the detection of certain types of tumors, such as pheochromocytoma or neuroblastoma.

2020年11月6日 · Vanillylmandelic acid (VMA) is one of the breakdown products (metabolites) of epinephrine (adrenaline) and norepinephrine. The VMA test primarily detects or rules out tumors called neuroblastomas in children.

Vanillylmandelic acid (VMA) and other catecholamine metabolite, such as homovanillic acid (HVA), measurements in urine are used for screening children for catecholamine-secreting tumors, such as neuroblastoma and other neural crest tumors, and monitoring those who have had treatment for these tumors.

Diagnose pheochromocytoma, VMA is of value for evaluation of hypertension, diagnose and follow up neuroblastoma, ganglioneuroma, and ganglioneuroblastoma. Most neuroblastoma patients excrete excess HVA in 24-hour collections. If VMA and HVA are both used in work-up, up to 80% of all cases will be detected.

Since its development in the mid-20th century, the VMA test has become a trusted, non-invasive method for examining adrenal gland activity and related disorders. In this article, we’ll explore the purpose of the urine VMA test, its importance, and how it contributes to diagnosing and managing specific health conditions.

VMA is 10 to 100 times more concentrated in the urine than other amines. Increased catecholamine is found in the patient with: Fall in blood pressure (Decreased blood volume). Thyroid hormone deficiency. Congestive heart failure. Arrhythmias. Decreased level of catecholamines seen in a patient with idiopathic postural hypotension.

Pediatric testing for the evaluation of hypertension; diagnose and follow up neuroblastoma, ganglioneuroma, and ganglioneuroblastoma. Most neuroblastoma patients excrete excess HVA in 24-hour collections. If VMA and HVA are both used …

2019年8月28日 · Vanillylmandelic acid (VMA) is one of the metabolites of the catecholamines adrenaline (epinephrine) and noradrenaline (norepinephrine), hormones produced in the adrenal glands. This test measures the amount of VMA that is excreted into the urine, typically over a 24-hour period, to detect excess catecholamine production.

Urinary vanillylmandelic acid (VMA) concentration is useful in the biochemical diagnosis and monitoring of neuroblastomas [1]. VMA measurement from random urine specimens, expressed as the ratio of VMA to creatinine, may provide equivalent diagnostic value as VMA measurement from 24-hour urine specimens for the evaluation of neuroblastomas [1].

2025年3月4日 · Moderately elevated HVA (homovanillic acid) and VMA (vanillylmandelic acid) can be caused by a variety of factors such as essential hypertension, intense anxiety, intense physical exercise, and numerous drug interactions (including some over-the-counter medications and herbal products).