title: I-123 MIBG scintigraphy in adults. A report of clinical experience.
abstract: Thirty-one adult patients with clinical findings suggestive of pheochromocytoma were studied with I-123 MIBG. All patients had images obtained at 24 and 48 hours. Five patients had abnormal uptake proved to be because of I-123 MIBG avid tumors. The remaining 26 patients had no proven tumors and showed physiologic uptake in various organs. The 24-hour images were of high quality. In all cases, the 48-hour images contributed no significant additional information. Only in 1 patient did the 48-hour image add some certainty. Physiologic uptake was seen in the salivary glands, liver, G.I. tract, and urinary bladder in all patients (100%). Uptake was also observed in the lung and heart (90%), normal adrenal glands (32%), thyroid (29%), spleen (23%) uterus (13%), and neck muscles (6%). The authors' experience indicates that I-123 MIBG gives superior images compared to the previously used I-131 MIBG, that the optimum imaging time for adults is 18-24 hours, and that normal distribution patterns including uterine and neck muscle uptake should be familiar to physicians interpreting the studies.
authors.affiliation: Eugene L. Saenger Radioisotope Laboratory, Department of Radiology, University of Cincinnati Medical Center, OH 45267, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Elgazzar
authors.forename: M J
authors.initials: MJ
authors.lastname: Gelfand
authors.forename: L C
authors.initials: LC
authors.lastname: Washburn
authors.forename: J
authors.initials: J
authors.lastname: Clark
authors.forename: N
authors.initials: N
authors.lastname: Nagaraj
authors.forename: D
authors.initials: D
authors.lastname: Cummings
authors.forename: J
authors.initials: J
authors.lastname: Hughes
authors.forename: H R
authors.initials: HR
authors.lastname: Maxon
mesh_terms: D019797:3-Iodobenzylguanidine; D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes / Q000493:pharmacokinetics; D007462:Iodobenzenes / Q000493:pharmacokinetics; D008297:Male; D008875:Middle Aged; D010673:Pheochromocytoma / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012016:Reference Values; D013997:Time Factors; D014018:Tissue Distribution
chemical_list: D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D019797:3-Iodobenzylguanidine