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Preliminary screening test for diagnosing tumors that secrete catecholamines, such as pheochromocytomas or paragangliomas.

The Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS) method, reported as Metanephrines, Fract., Free, P, examines plasma samples for fractionated and free metanephrines, such as normetanephrine and metanephrine. Patient preparation is necessary to ensure accurate results; individuals should abstain from using an Epi-pen within the past 7 days. Plasma should be collected using lavender top EDTA tubes, promptly centrifuged, and aliquoted into plastic vials within 2 hours to preserve sample quality.
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
TBC
Fractionated metanephrines +
Free Metanephrine
Metanephrines free, plasma
NMN (Normetanephrines), plasma
Normetanephrine, (NMN), free
Normetanephrines, plasma
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Plasma EDTA
TBC
Patient Preparation: Use of an Epi-pen within the last 7 days may produce inaccurate results.
Collection Container/Tube: Lavender top (EDTA)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot plasma into a plastic vial within 2 hours of collection.
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