Internal medicine
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Malignant hypertension triggers incremental renin activity, whereas primary aldosteronism suppresses such activity. We encountered a patient with malignant hypertension refractory to multiple anti-hypertensive agents. ⋯ Following the diagnosis of bilateral primary aldosteronism, we initiated a mineralocorticoid receptor antagonist, which improved his blood pressure. Repeated neurohormonal assessments are encouraged to correctly diagnose underlying primary aldosteronism with malignant hypertension.