Vanillylmandelic Acid, urine test
VMA test may be ordered along with one or more metanephrine or catecholamine tests when a doctor suspects that a person has a pheochromocytoma. They may be ordered when a person has persistent or recurring hypertension that is not responding to conventional therapies, to monitor the effectiveness of treatment for a pheochromocytoma, and periodically to monitor for recurrence