10 days
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
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Measures metanephrines in 24-hour urine. Confirms catecholamine-secreting tumors.
24 hour urine
10 mL
Plastic urine container with no preservative or 6N HCl.
No caffeine before or during collection. Monamine oxidase inhibitors should be discontinued at least one week prior to beginning collection.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |