title: Small serotonin-producing neuroendocrine tumor of the pancreas associated with pancreatic duct obstruction.
abstract: OBJECTIVE
  Pancreatic neuroendocrine tumors expressing serotonin (carcinoid tumors) account for a small portion of pancreatic neuroendocrine tumors. The purpose of this study was to describe cases of small serotonin-producing pancreatic neuroendocrine tumors associated with pancreatic duct obstruction.
  
  
  CONCLUSIONS
  Serotonin produced by pancreatic neuroendocrine tumors can induce fibrosis and pancreatic duct obstruction. Pancreatic neuroendocrine tumors should be considered when CT shows a small hypervascular mass associated with upstream pancreatic duct dilatation or atrophy. Evidence of small pancreatic neuroendocrine tumors should be sought in cases of idiopathic pancreatic duct stenosis.
authors.affiliation: Russell H Morgan Department of Radiology and Radiological Science, Johns Hopkins Hospital, 601 N Caroline St, JHOC 3235A, Baltimore, MD 21287, USA.
authors.forename: Satomi
authors.initials: S
authors.lastname: Kawamoto
authors.forename: Chanjuan
authors.initials: C
authors.lastname: Shi
authors.forename: Ralph H
authors.initials: RH
authors.lastname: Hruban
authors.forename: Michael A
authors.initials: MA
authors.lastname: Choti
authors.forename: Richard D
authors.initials: RD
authors.lastname: Schulick
authors.forename: Elliot K
authors.initials: EK
authors.lastname: Fishman
authors.forename: Stanley S
authors.initials: SS
authors.lastname: Siegelman
mesh_terms: D000328:Adult; D002276:Carcinoid Tumor / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000473:pathology; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology; D005260:Female; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008875:Middle Aged; D018358:Neuroendocrine Tumors / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000473:pathology; D010182:Pancreatic Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging / Q000473:pathology*; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000473:pathology; D012701:Serotonin / Q000378:metabolism; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional
chemical_list: D012701:Serotonin