Abstract
ABSTRACT Objective: Cystic pheochromocytomas can become enlarged without abdominal symptoms and can potentially be confused with other abdominal cystic tumors. Methods: We report here a case of a 45-mm cystic pheochromocytoma that was initially considered a pancreatic cystic tumor. The patient had a 4-year history of treatment for hypertension and occasional headaches. Left cystic pheochromocytoma was diagnosed based on excessive catecholamine levels, 18F-fluoro-2-deoxy-d-glucose positron emission tomography/computed tomography (18F-FDG PET/CT), and 123I-metaiodobenzylguanidine (123I-MIBG) scintigraphy. Results: Left adrenalectomy ameliorated the patient's hypertension and headache. Pathologic findings showed an enlarged cyst with an irregular, thick wall adherent to the normal adrenal tissues. Conclusion: A large cystic pheochromocytoma can be misdiagnosed as a large pancreatic cystic tumor. CT and magnetic resonance imaging (MRI) are less important in excluding the possibility of pheochromocytoma than b...
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