How are suppression tests used for the diagnosis of pheochromocytomas?

Updated: Jul 20, 2020
  • Author: Michael A Blake, MBBCh, MRCPI, FRCR; Chief Editor: George T Griffing, MD  more...
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Suppression tests using phentolamine and clonidine can also be used for diagnostic purposes. NANETS guidelines recommend clonidine suppression testing when plasma metanephrine values are less than 4-fold above the upper reference limit. [37]

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