Pheochromocytomas are catecholamine-producing neuroendocrine tumors that arise from the adrenal medulla. The clinical presentation includes headache, palpitation, and hypertension, but pheochromocytomas are sometimes clinically silent. The present case highlights the importance of biochemical testing for pheochromocytoma in patients with adrenal incidentaloma, even if they are completely normotensive and asymptomatic.
Keywords: adrenal incidentaloma; doxazosin; immunohistochemistry; metaiodobenzylguanidine scintigraphy; normotensive; pheochromocytoma.