title: Iodine-123 MIBG imaging in a generalized pancreatic polypeptide-gastrin-serotonin secreting tumor.
abstract: The usefulness of radio-metaiodobenzylguanidine (MIBG), a specific radiopharmaceutical agent for scintigraphic imaging and treatment of phaeochromocytoma and neuroblastoma, has been extended to the location of carcinoid tumors. Scintigraphic evaluation with I-123 MIBG in a patient with a histologically proven endocrine tumor (apudoma) of unknown origin with liver and bone metastases is reported. Elevated plasma hormone levels of gastrin, pancreatic polypeptide, and serotonin were found. Tumoral content of these hormones was immunocytochemically confirmed on liver biopsy. I-123 MIBG uptake could be seen in those areas of the liver with deficient lesions in the Tc-99m colloid image with a maximal uptake in a large mass at the level of the left liver lobe. No abnormal uptake could be observed at any other level, which was in contrast with autopsy findings of generalized metastatic disease.
authors.affiliation: Department of Internal Medicine, University Hospital, Vrije Universiteit Brussels, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Somers
authors.forename: K
authors.initials: K
authors.lastname: Vanden Houte
authors.forename: O
authors.initials: O
authors.lastname: Segers
authors.forename: A
authors.initials: A
authors.lastname: Bossuyt
mesh_terms: D019797:3-Iodobenzylguanidine; D000328:Adult; D001079:Apudoma / Q000000981:diagnostic imaging* / Q000378:metabolism; D005260:Female; D005755:Gastrins / Q000378:metabolism*; D006801:Humans; D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D010191:Pancreatic Polypeptide / Q000378:metabolism*; D011877:Radionuclide Imaging; D012701:Serotonin / Q000378:metabolism*
chemical_list: D005755:Gastrins; D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D012701:Serotonin; D019797:3-Iodobenzylguanidine; D010191:Pancreatic Polypeptide