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. 2019 May 8.
doi: 10.20344/amp.11660. Online ahead of print.

[Reninoma: A Rare Cause of Endocrine Hypertension]

[Article in Portuguese]
Affiliations
Free article

[Reninoma: A Rare Cause of Endocrine Hypertension]

[Article in Portuguese]
Bernardo Marques et al. Acta Med Port. .
Free article

Abstract

Juxtaglomerular tumours are rare causes of secondary hypertension. They typically present with difficult-to-manage hypertension, hypokalemia, hyperreninemia and secondary hyperaldosteronism. The authors describe a clinical case of a 45 years old female patient, with personal history of difficult-to-manage hypertension and hypokalemia since age 35, medicated with four types of anti-hypertensive agents. An analytical study was performed, which revealed secondary hyperaldosteronism [aldosterone 44.3 ng/dL (4 - 28 ng/dL), renin > 1000 mIU/mL (4.4 - 46.2 mIU/mL)]. Abdominal computed tomography scan identified a heterogeneous nodule located in the middle third of the right kidney, with 3.7 cm. Partial nephrectomy was performed and histological analysis confirmed the diagnosis of reninoma. After surgery, the patient had normal levels of aldosterone (9.2 ng/dL) and renin (1.20 mIU/mL), as well as normal blood pressure. The authors want to highlight this potentially curable cause of endocrine hypertension. Surgical resection is the treatment of choice and leads to normalization of blood pressure.

Os tumores justa-glomerulares são causas raras de hipertensão arterial de difícil controlo e cursam habitualmente com hipocaliémia, hiperreninémia e hiperaldosteronismo secundário. Descreve-se o caso de uma doente, de 45 anos, com história pessoal de hipertensão arterial de difícil controlo associada a hipocaliémia desde os 35 anos, medicada com quatro classes de anti-hipertensores. Do estudo realizado destaca-se hiperaldosteronismo secundário [aldosterona 44,3 ng/dL (4 - 28 ng/dL), renina > 1000 mUI/mL (4,4 - 46,16 mUI/mL)] e tomografia axial computorizada, que identificou formação nodular heterogénea localizada no terço médio do rim direito, com 3,7 cm de diâmetro. Foi realizada nefrectomia parcial, cuja análise histológica confirmou o diagnóstico de reninoma. Após a cirurgia, verificou-se normalização dos doseamentos hormonais (aldosterona 9,2 ng/dL; renina 1,20 mUI/mL) e da pressão arterial. Pretende-se chamar a atenção para esta causa potencialmente curável de hipertensão arterial endócrina. A ressecção cirúrgica é o tratamento de escolha e leva à normalização da pressão arterial.

Keywords: Aldosterone; Hypertension/etiology; Juxtaglomerular Apparatus; Kidney Neoplasms; Renin.

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