Vanillylmandelic Acid (VMA) 24 Hour Urine

Elevated values of VMA along with other catecholamine metabolites are suggestive of catecholamine secreting tumor like Neuroblastoma, Pheochromocytoma and other Neural crest tumors. VMA levels may also be useful in monitoring patients who are also treated. Elevated levels are suggestive of Pheochromocytoma but not diagnostic