An extra-adrenal pheochromocytoma was associated with ipsilateral renal artery stenosis. The pheochromocytoma was initially overlooked when renovascular hypertension was mistakenly diagnosed. The renal artery stenosis proved to be functional and was totally reversed by adrenergic blocking agents, given for hypertension, and subsequent tumor removal. Functional renal artery stenosis caused by catecholamine-induced vasospasm may be more common than previously recognized with pheochromocytomas, particularly those in an extra-adrenal location in the renal hilum.
Brewster DC, Jensen SR, Novelline RA. Reversible Renal Artery Stenosis Associated With Pheochromocytoma. JAMA. 1982;248(9):1094–1096. doi:10.1001/jama.1982.03330090064032
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