急性心不全を契機に診断された副腎外褐色細胞腫の1例

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A 22-year old female had an episode of acute heart and respiratory failure requiring mechanical ventilation ducing a trip overseas. Echocardiography demonstrated akinesis of the apical area (left ventricle ejectionfraction(LVEF) =15%). Since computed tomography (CT) with coronary angiography to rule out acute coronary syndrome showed no abnormalities, she was diagnosed with morphological stress cardiomyopathy due to akinesis of the apical area. After returning to Japan, she was admitted to our hospital for further examination. She had an increased level of catecholamines in 24-hour urine. 131Imetaiodobenzyguanidine scintigraphy, CT scan and fluorodexyglucose positron emission tomography revealed a retroperitoneal mass. From these results, a diagnosis of extra-adrenal pheochromocytoma with catecholamine-induced cardiomyopathy was made. Histological diagnosis of the laparoscopically resected tumor was pheochromocytoma. After the operation, the level of catecholamines in 24-hour urine was normalized.