Iatrogenic Renal Hypertension:

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Abstract
Two young men with familial extra-adrenal pheochromocytoma (paraganglioma) had almost identical tumors removed with similar postoperative courses, complicated by development of other causes of hypertension. Renal ischemia and persistent blood pressure elevation occurred in both patients but were caused by different anatomic defects. One developed retroperitoneal fibrosis that gradually obstructed renal blood flow to the right kidney; the second patient had a small aberrant artery to the inferior pole of the kidney ligated with prompt development of hypertension. Nephrectomy was necessary in the first patient; segmental resection of the ischemic portion of the kidney was sufficient to interrupt the renin-angiotensin system and allow the blood pressure to return to normal in the second patient.