title: Aldosterone-producing microadenoma in a patient with primary aldosteronism.
abstract: A 54-year-old patient was found to have an aldosterone-producing microadenoma measuring 2.5 mm in diameter. Although adrenal venography by selective catheterization had failed to demonstrate the tumour, adrenal scintiscan using 131I-19-iodocholesterol accurately localized the functional tumour in the right adrenal gland; a dexamethasone-modified adrenal scintiscan revealed complete suppression of radioactivity in the right adrenal gland. These findings suggest that adrenal scintiscan, together with adrenal vein blood analysis, is capable of detecting a small adenoma before surgery, and that dexamethasone suppression of an adrenal scintiscan does not exclude an adenoma.
mesh_terms: D000236:Adenoma / Q000150:complications*; D000310:Adrenal Gland Neoplasms / Q000150:complications*; D000450:Aldosterone / Q000378:metabolism*; D006801:Humans; D006929:Hyperaldosteronism / Q000209:etiology*; D008297:Male; D008875:Middle Aged
chemical_list: D000450:Aldosterone