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Complementary roles of CT and /sup 131/I-MIBG scintigraphy in diagnosing pheochromocytoma

Journal Article · · AJR, Am. J. Roentgenol.; (United States)
Recently /sup 131/I-MIBG (metaiodobenzylguanidine), an adrenergic tissue-localizing radiopharmaceutical, has been used for diagnosis of pheochromocytoma. In a retrospective study of 32 patients with pathologically proved primary, metastatic, or recurrent pheochromocytoma, the roles of /sup 131/I-MIBG scintigraphy and computed tomography (CT) in pheochromocytoma detection were compared. The two methods were equally accurate in the identification of primary and recurrent pheochromocytoma. /sup 131/I-MIBG scanning was more accurate as the initial examination in patients with extraadrenal tumors. In patients with metastatic disease, scintigraphy was preferable to CT because of its nontomographic nature, which permitted imaging of the entire body. Although a positive MIBG scan is diagnostic of pheochromocytoma, CT of extraadrenal tumors (particularly in the chest) has been very useful in planning appropriate surgical intervention. Furthermore, the roles of /sup 131/I-MIBG scintigraphy and CT in the detection of pheochromocytoma are complementary because each method has certain limitations.
Research Organization:
Department of Radiology, University of Michigan Medical Center, Ann Arbor
OSTI ID:
5504630
Journal Information:
AJR, Am. J. Roentgenol.; (United States), Journal Name: AJR, Am. J. Roentgenol.; (United States) Vol. 141:4; ISSN AAJRD
Country of Publication:
United States
Language:
English