title: A wolf in sheep's clothing: a non-functioning islet cell tumor of the pancreas masquerading as a microcystic (serous cystic) adenoma.
abstract: BACKGROUND
  The endosonographic appearance of a microcystic "honeycomb" lesion of the pancreas usually indicates a serous cystic adenoma.
  
  
  METHODS
  We report a case of a non-functioning islet cell tumor that has the typical microcystic "honeycomb" appearance of a serous cystic adenoma. The implications for endoscopic ultrasound diagnosis and management of cystic pancreatic lesions are discussed.
  
  
  CONCLUSIONS
  Islet cell tumors are a rare differential diagnosis of microcystic pancreatic lesions. If fine needle aspiration remains non-diagnostic preoperative distinction from serous cystic adenomas may be impossible.
authors.affiliation: Division of Gastroenterology, Department of Medicine, Duke University Medical Center, Durham, NC, USA. henninggerke@web.de
authors.forename: Henning
authors.initials: H
authors.lastname: Gerke
authors.forename: Michaell F
authors.initials: MF
authors.lastname: Byrne
authors.forename: Huiwen Bill
authors.initials: HB
authors.lastname: Xie
authors.forename: Erik K
authors.initials: EK
authors.lastname: Paulson
authors.forename: Douglas S
authors.initials: DS
authors.lastname: Tyler
authors.forename: John
authors.initials: J
authors.lastname: Baillie
authors.forename: Paul S
authors.initials: PS
authors.lastname: Jowell
mesh_terms: D000236:Adenoma / Q000175:diagnosis*; D007516:Adenoma, Islet Cell / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis*