title: [Significance of false-positive findings of somatostatin receptor scintigraphy in diagnosis of neuroendocrine tumors of the gastroenteropancreatic system].
abstract: Localization of gastroenteropancreatic neuroendocrine tumors with conventional imaging techniques can be difficult. With the advent of the somatostatin-receptor scintigraphy the diagnosis of these could be improved. In this study 76 patients with immunohistologically proven neuroendocrine tumors were analysed by comparing somatostatin-receptor scintigraphy with conventional imaging techniques. Somatostatin-receptor-positive lesions were observed in 61 of all patients. Conventional imaging techniques (transabdominal ultrasonography, computerized tomographic scanning of the abdomen, magnetic resonance imaging of the abdomen) revealed neuroendocrine tumors in 42 patients (69%). A follow up of 19 patients with initially false positive somatostatin-receptor scintigrams showed that at least 6 patients had escaped the initial diagnosis by conventional techniques. All in all, our data support previous findings and demonstrate that somatostatin-receptor scintigraphy is a safe and sensitive procedure for in vivo imaging of gastroenteropancreatic neuroendocrine tumors. In addition, in certain cases, somatostatin-receptor scintigraphy is able to detect tumors that had escaped conventional imaging techniques.
authors.affiliation: Abteilung für Innere Medizin mit Schwerpunkt Gastroenterologie, Universitätsklinikum Steglitz, Freien Universität Berlin.
authors.forename: S
authors.initials: S
authors.lastname: Faiss
authors.forename: H
authors.initials: H
authors.lastname: Scherübl
authors.forename: M
authors.initials: M
authors.lastname: Bäder
authors.forename: U
authors.initials: U
authors.lastname: Fett
authors.forename: K
authors.initials: K
authors.lastname: Koppenhagen
authors.forename: B
authors.initials: B
authors.lastname: Wiedenmann
authors.forename: E O
authors.initials: EO
authors.lastname: Riecken
mesh_terms: D003131:Combined Modality Therapy; D005189:False Positive Reactions; D005260:Female; D005500:Follow-Up Studies; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging* / Q000628:therapy; D006801:Humans; D007205:Indium Radioisotopes; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D018358:Neuroendocrine Tumors / Q000000981:diagnostic imaging* / Q000628:therapy; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000628:therapy; D011877:Radionuclide Imaging; D017481:Receptors, Somatostatin / Q000032:analysis*; D013004:Somatostatin / Q000031:analogs & derivatives
chemical_list: D007205:Indium Radioisotopes; D017481:Receptors, Somatostatin; D013004:Somatostatin; C081788:pentetreotide
vernacular_title: Bedeutung falsch-positiver Befunde der Somatostatinrezeptor-Szintigraphie in der Diagnostik neuroendokriner Tumoren des gastroenteropankreatischen Systems.