Avasucular necrosis of pheochromocytoma followed by spontaneous remission

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Abstract
Following an acute spontaneous hypertensive crisis and shock a patient with pheochromocytoma had an exceedingly high catecholamine excretion rate. After this episode, the patient remained normotensive and urinary excretion of catecholamines returned to normal. During surgery, a large pheochromocytoma was found and removed that showed avascular necrosis. In pheochromocytoma, a sudden and exceedingly high rate of catecholamine release may cause intense vasoconstriction generally and within the tumor itself. In this patient, avascular tumor necrosis led to a spontaneous remission of clinical symptoms.