Sep 28, 2020 · Conditions associated with elevations in urinary vanillylmandelic acid (VMA) include the following: Neuroblastoma · Pheochromocytoma. Other ...
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Nov 6, 2020 · A VMA test was once frequently ordered to detect pheochromocytomas, but the preferred tests are now plasma free metanephrines, urine ...
VMA is not the analyte of choice for diagnosis of pheochromocytoma, which is better detected by testing for metanephrines. Treatment with L-dopa can impact test ...
Vanillylmandelic acid
Chemical compound
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Vanillylmandelic acid is a chemical intermediate in the synthesis of artificial vanilla flavorings and is an end-stage metabolite of the catecholamines. It is produced via intermediary metabolites. Wikipedia
Chemical formula: C9H10O5
Molar mass: 198.173 g/mol
Appearance: White powder
Melting point: 133 °C (271 °F; 406 K)
Urinary excretion of metanephrines and VMA remains normal until the very end stage of renal disease, so elevated levels validly diagnose pheochromocytoma. False ...
May 9, 2007 · Chemical tests include studies of catecholamines, total metanephrines, and vanillylmandelic acid (VMA). The choice of initial testing may be ...
Elevated HVA and VMA values are suggestive of a pheochromocytoma, but they are not diagnostic. Cautions. Discusses conditions that may cause diagnostic ...
Abstract. Objective: To investigate the positive predictive value (PPV) of urinary vanillylmandelic acid (VMA) testing in the diagnosis of phaeochromocytoma and ...
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Diagnose pheochromocytoma, VMA is of value for evaluation of hypertension, diagnose and follow up neuroblastoma, ganglioneuroma, and ganglioneuroblastoma.
Vanillylmandelic acid (VMA) is produced in the liver and is a major product of norepinephrine and epinephrine metabolism excreted in the urine. Therefore VMA is ...
Elevated values are suggestive of a pheochromocytoma, but they are not diagnostic. Report Available. 3 to 5 days. Day(s) Performed. Monday through Friday ...