title: False-positive 123I-metaiodobenzylguanidine (MIBG) scan in a patient with angiomyolipoma; positive MIBG scan does not necessarily indicate the presence of pheochromocytoma.
abstract: 123I-Metaiodobenzylguanidine (123I-MIBG)-accumulation in angiomyolipoma (AML) is demonstrated. A 24-year-old Japanese woman presented with tumors in the right retroperitoneal space. The tumors, which accumulated 123I-MIBG, had been thought to be adrenal pheochromocytoma before surgery. They were removed, and were found to be AML. 123I-MIBG was accumulated in AML. 123I-MIBG-accumulation in AML led to a false-positive diagnosis of adrenal pheochromocytoma. Catecholamine levels had been normal. No chromaffin cells were found in the histological examination of the tumors. MIBG accumulation does not necessarily indicate the presence of pheochromocytoma.
authors.affiliation: Department of Endocrinology and Metabolism, University of the Ryukyus, Okinawa. takasun@med.u-ryukyu.ac.jp
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Takasu
authors.forename: Mina
authors.initials: M
authors.lastname: Hayashi
authors.forename: Masaki
authors.initials: M
authors.lastname: Takara
authors.forename: Takako
authors.initials: T
authors.lastname: Iha
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kouki
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Ohshiro
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Ogawa
mesh_terms: D019797:3-Iodobenzylguanidine; D000310:Adrenal Gland Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging*; D000328:Adult; D018207:Angiomyolipoma / Q000175:diagnosis / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography; D010673:Pheochromocytoma / Q000175:diagnosis / Q000000981:diagnostic imaging*; D019275:Radiopharmaceuticals; D015899:Tomography, Emission-Computed, Single-Photon
chemical_list: D019275:Radiopharmaceuticals; D019797:3-Iodobenzylguanidine