PMID- 18310290 OWN - NLM STAT- MEDLINE DCOM- 20080508 LR - 20080623 IS - 1351-0088 (Print) IS - 1351-0088 (Linking) VI - 15 IP - 1 DP - 2008 Mar TI - Somatostatin-producing neuroendocrine tumors of the duodenum and pancreas: incidence, types, biological behavior, association with inherited syndromes, and functional activity. PG - 229-41 LID - 10.1677/ERC-07-0157 [doi] AB - Somatostatin-producing neuroendocrine tumors (SOM-NETs) of the duodenum and pancreas appear to be heterogeneous. To determine their clinicopathological profiles, respective data were analyzed on a series of 82 duodenal and 541 pancreatic NETs. In addition, the clinical records of 821 patients with duodenal or pancreatic NETs were reviewed for evidence of a somatostatinoma syndrome. Predominant or exclusive expression of somatostatin was found in 21 (26%) duodenal and 21 (4%) pancreatic NETs. They were classified as sporadic (n=31) or neurofibromatosis type 1 (NF1)-associated duodenal NETs (n=3), gangliocytic paragangliomas (GCPGs; n=6), or poorly differentiated neuroendocrine carcinomas (pdNECs; n=2). In addition, five duodenal and four pancreatic SOM-NETs were found in five patients with multiple endocrine neoplasia type 1 (MEN1). Metastases occurred in 13 (43%) patients with sporadic or NF1-associated SOM-NETs, but in none of the duodenal or pancreatic MEN1-associated SOM-NETs or GCPGs. Sporadic advanced (stage IV) SOM-NETs were more commonly detected in the pancreas than in the duodenum. None of the patients (including the 821 patients for whom only the clinical records were reviewed) fulfilled the criteria of a somatostatinoma syndrome. Our data show that somatostatin expression is not only seen in sporadic NETs but may also occur in GCPGs, pdNECs, and hereditary NETs. Surgical treatment is effective in most duodenal and many pancreatic SOM-NETs. MEN1-associated SOM-NETs and GCPGs follow a benign course, while somatostatin-producing pdNECs are aggressive neoplasms. The occurrence of the so-called somatostatinoma syndrome appears to be extremely uncommon. FAU - Garbrecht, Nele AU - Garbrecht N AD - Department of Pathology, University of Kiel, Michaelisstr 11, Kiel, Germany. ngarbrecht@path.uni-kiel.de FAU - Anlauf, Martin AU - Anlauf M FAU - Schmitt, Anja AU - Schmitt A FAU - Henopp, Tobias AU - Henopp T FAU - Sipos, Bence AU - Sipos B FAU - Raffel, Andreas AU - Raffel A FAU - Eisenberger, Claus F AU - Eisenberger CF FAU - Knoefel, Wolfram T AU - Knoefel WT FAU - Pavel, Marianne AU - Pavel M FAU - Fottner, Christian AU - Fottner C FAU - Musholt, Thomas J AU - Musholt TJ FAU - Rinke, Anja AU - Rinke A FAU - Arnold, Rudolf AU - Arnold R FAU - Berndt, Uta AU - Berndt U FAU - Plockinger, Ursula AU - Plockinger U FAU - Wiedenmann, Bertram AU - Wiedenmann B FAU - Moch, Holger AU - Moch H FAU - Heitz, Philipp U AU - Heitz PU FAU - Komminoth, Paul AU - Komminoth P FAU - Perren, Aurel AU - Perren A FAU - Kloppel, Gunter AU - Kloppel G LA - eng PT - Journal Article PT - Multicenter Study PT - Research Support, Non-U.S. Gov't PL - England TA - Endocr Relat Cancer JT - Endocrine-related cancer JID - 9436481 RN - 51110-01-1 (Somatostatin) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Duodenal Neoplasms/metabolism/*pathology MH - Female MH - Follow-Up Studies MH - *Genetic Predisposition to Disease MH - Humans MH - Incidence MH - Male MH - Middle Aged MH - Multiple Endocrine Neoplasia Type 1/metabolism/pathology MH - Neuroendocrine Tumors/genetics/*metabolism/*pathology MH - Pancreatic Neoplasms/metabolism/*pathology MH - Paraganglioma/metabolism/pathology MH - Prognosis MH - Somatostatin/*metabolism MH - Somatostatinoma/metabolism/pathology MH - Syndrome EDAT- 2008/03/04 09:00 MHDA- 2008/05/09 09:00 CRDT- 2008/03/04 09:00 PHST- 2008/03/04 09:00 [pubmed] PHST- 2008/05/09 09:00 [medline] PHST- 2008/03/04 09:00 [entrez] AID - 15/1/229 [pii] AID - 10.1677/ERC-07-0157 [doi] PST - ppublish SO - Endocr Relat Cancer. 2008 Mar;15(1):229-41. doi: 10.1677/ERC-07-0157.