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  • Title: [A case of idiopathic hyperaldosteronism diagnosed by adrenal imaging].
    Author: Miura S, Matauoka H, Tashiro E, Sasaguri M, Ideishi M, Ikeda M, Arakawa K.
    Journal: Fukuoka Igaku Zasshi; 1993 Mar; 84(3):100-2. PubMed ID: 8477923.
    Abstract:
    We report a case of idiopathic hyperaldosteronism (IHA) which was differentiated from an aldosterone producing adenoma by the adrenal imaging techniques with computed tomography (CT) and scintigraphy. In this patient, the high basal aldosterone level with the suppressed plasma renin activity typically indicated the diagnosis of primary aldosteronism. However, the differentiation from an aldosterone producing adenoma by responses of plasma aldosterone levels to upright posture, captopril or adrenocorticotropic hormone (ACTH) administration was not definitive. Abdominal CT revealed bilateral adrenal swelling. Adrenal scintillation scanning with 131I-iodocholesterol showed bilateral uptake even after the administration of dexamethasone. Blood sampling from the right adrenal vein was unsuccessful. Blood pressure and serum potassium levels remained unchanged during dexamethasone administration (2 mg/day) over ten days. After the administration of spironolactone and nisoldipine blood pressure and serum potassium levels were normalized. Adrenal imaging is considered to be very useful for the diagnosis of IHA.
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