How to screen for pheochromocytoma, primary aldosteronism and Cushing's syndrome
Meyer, P.
Revue Medicale Suisse 5(185): 15-18
2009
ISSN/ISBN: 1660-9379 PMID: 19216319 Document Number: 12935
Pheochromocytoma, primary aldosteronism and Cushing's syndrome are uncommon disorders and are difficult to diagnose because laboratory tests lack validation and specificity. Despite these limitations, practice guidelines are proposed to standardize the screening procedure. The most reliable method to diagnose pheochromocytoma is the measurement of plasmatic and/or urinary metanephrines and normetanephrines depending on the pre-test probability of the disease. The approach for detection of primary aldosteronism is based on the aldosterone-renin ratio under standard conditions. Finally, three tests are available to establish the diagnosis of Cushing's syndrome: 24-h urinary free cortisol excretion, low-dose dexamethasone suppression test and the recent and promising late evening salivary cortisol.
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