Pheochromocytoma differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]

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Overview

Pheochromocytoma must be differentiated from anxiety, carcinoid, and hypoglycemia.

Differentiating Pheochromocytoma from other Diseases

The differential diagnosis of pheochromocytoma includes:

Sympathomimetic drugs that can induce symptoms simulating pheochromocytoma include high-dose phenylpropanolamine (a popular over-the-counter decongestant and appetite suppressant), cocaine, amphetamines, phencyclidine, epinephrine, phenylephrine, and terbutaline, and the combination of a monoamine oxidase (MAO) inhibitor and ingestion of tyramine-containing foods [7,26-29]. Mercury intoxication also can mimic pheochromocytoma, producing both hypertension and elevated urine and plasma catecholamines [30].

Panic disorder can replicate many of the symptoms of pheochromocytoma because it is associated with increased sympathetic activity. Hypertension in these patients occurs primarily during treatment with a tricyclic antidepressant drug, which may increase the degree of sympathetic arousal.

The potential importance of this disorder in the differential diagnosis of pheochromocytoma was illustrated in a study in which 300 adults were referred for possible pheochromocytoma .

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