II. Physiology
- VMA is a Catecholamine metabolite
III. Indications
- Pheochromocytoma (other tests used more often)
- Neuroblastoma diagnosis or monitoring
- Suspected Multiple endocrine adenomatosis
-
Thyroid
Medullary Carcinoma
- Evaluation for coexisting Pheochromocytoma
IV. Labs: Normal Levels
- Age 3-8 years: less than 2.3 mg per day
- Age 9-12 years: less than 3.4 mg per day
- Age 13-17 years: less than 3.9 mg per day
- Adults: less than 6.7 mg per day
V. Causes: Increased VMA Levels
- Pheochromocytoma
- Neuroblastoma
- Ganglioma