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Also known as: VMAU
Formal name: Vanillylmandelic Acid, urine

At a Glance

Why Get Tested?

To help diagnose or rule out a neuroblastoma, phaeochromocytoma, or other neuroendocrine tumour; to monitor the effectiveness of treatment

When to Get Tested?

When your child has an abdominal mass, bruising around the eyes, trouble walking, or bone pain; when you have symptoms of increased catecholamine release, such as persistent or episodic high blood pressure, severe headaches, rapid heart rate, and sweating; when you have been treated for a neuroendocrine tumour, such as neuroblastoma or phaeochromocytoma

Sample Required?

A 24-hour urine sample is preferred; sometimes a random urine sample is acceptable.

Test Preparation Needed?

This test is affected by caffeine, certain drugs, and stresses. Inform your doctor of any medications you are taking and follow any instructions you are given for things to avoid before sample collection.