Adrenal Gland Tumor Screening - Vanillylmandelic Acid 24-hour Urine Test (VMA)

Quantitative measurement of vanillylmandelic acid (VMA) levels in a 24-hour urine collection. VMA is a major metabolite of catecholamines (adrenaline and noradrenaline). It is primarily used to aid in the diagnosis of pheochromocytoma and other neuroendocrine tumors.