PMID: 15248825Jul 14, 2004Paper

Postoperative differentiation between unilateral adrenal adenoma and bilateral adrenal hyperplasia in primary aldosteronism by mRNA expression of the gene CYP11B2

European Journal of Endocrinology
Ulla EnbergBertil Hamberger

Abstract

Primary aldosteronism (PA) is characterized by hypertension, hypokalemia and suppressed renin-angiotensin system caused by autonomous aldosterone production. The aim of this study was to localize mRNA expression of the genes coding for steroidogenic enzymes in adrenals from a group of patients with PA and relate this to clinical work-up, histopathology and outcome of adrenalectomy. This was a retrospective study of 27 patients subjected to adrenalectomy for PA. Clinical data were collected and follow-up of all patients was performed. Paraffin-embedded specimens were analyzed by the in situ hybridization technique, with oligonucleotide probes coding for the steroidogenic enzyme genes. The resected adrenals had the histopathologic diagnosis of adenoma (11), adenoma and/or hyperplasia (15) or hyperplasia (1). CYP11B2 expression (indicating aldosterone production) was found in a dominant adrenal nodule from 22 patients. Fourteen of these had additional CYP11B2 expression in the zona glomerulosa. All 22 patients were cured of PA by adrenalectomy. One of these patients, who had additional high expression of CYP11B2 in the zona glomerulosa, was initially cured, but the condition had recurred at follow-up. Two patients had a mass shown...Continue Reading

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