PMID: 9175301Feb 1, 1997Paper

Primary aldosteronism due to unilateral adrenal hyperplasia: a case report

Zhonghua yi xue za zhi = Chinese medical journal; Free China ed
L G ChenK T Tang

Abstract

Primary aldosteronism is one of the differential diagnosis of secondary hypertension. This is usually caused by an aldosterone producing adenoma or bilateral adrenal hyperplasia which comprise about 65% and 30% of the cases, respectively. However, less than 1% of primary aldosteronism is caused by unilateral adrenal hyperplasia which is a relatively rare subset of primary aldosteronism. The clinical and biochemical manifestations of the disorder are indistinguishable from aldosterone-producing tumor, and a definitive diagnosis can only be made by pathological finding. A 33-year-old male Chinese patient presented with hypertension, hypokalemia, metabolic alkalosis, and the hypersecretion of aldosterone associated with suppressed plasma renin activity which is a typical hallmark of primary aldosteronism. Image studies including both magnetic resonance imaging (MRI) and 131I NIP-59 scan as well as postural test suggested an aldosterone-producing tumor of the right adrenal gland. Unilateral adrenectomy and pathological examination of the right adrenal gland eventually proved a case of unilateral adrenal hyperplasia. Blood pressure, plasma potassium, aldosterone and renin activity levels returned to normal two weeks after operation ...Continue Reading

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