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Among others, the following conditions can present similar symptoms. Pheochomocytomas might be misdiagnosed as any of these conditions. Conversely, these conditions can erroneously be thought to be pheochromocytoma:
- Vasodilating headaches, ophthalmic migraines and cluster headaches
- Anxiety, psychoneurosis, psychosis
- Lesions of the nervous system: trauma, tumor, stroke, focal arterial insufficiency, autonomic hyperreflexia, diencephalic seizure and syndrome
- Dysfunctions of the central and peripheral nervous system: cardiogenic hypertensive reflex in angina pectoris; exaggerated response to hypovolemia or infection, paroxysmal tachycardia, familial dysautonomia.
- Possible drug abuse: amphetamines, cocaine, LSD, phenylpropanolamine, caffeine
- Known drug effects: interaction of monoamine oxidase inhibitors with certain food (cheeses) and beverages (beer, wine), clonidine withdrawal symptoms, atropine administration, nasal decongestants, tricyclic antidepressants
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