title: Intraductal oncocytic papillary neoplasm of the pancreas: a radio-pathological case study.
abstract: BACKGROUND
  An intraductal oncocytic papillary neoplasm is a rare pancreatic tumor with the potential of developing invasive carcinoma. Its differentiation from other cystic-like neoplasms of the pancreas, such as intraductal papillary mucinous neoplasms, is a challenge for pancreatic imaging.
  
  
  METHODS
  We present the case of a 76-year-old male with painless jaundice caused by an intraductal oncocytic papillary neoplasm of the pancreas. The imaging findings on computed tomography, magnetic resonance including diffusion-weighted imaging, and (18)F-fluorodeoxyglucose positron emission tomography are presented and the radio-pathological correlations are discussed.
  
  
  CONCLUSIONS
  An intraductal oncocytic papillary neoplasm of the pancreas appears as a cystic tumor communicating with the dilated pancreatic duct featuring intraductal tumor nodules. Intraductal oncocytic papillary neoplasms show a high (18)F-fluorodeoxyglucose-uptake in positron emission tomography and low diffusion values in diffusion-weighted imaging including apparent diffusion coefficient maps which may be a valuable attribute in distinguishing these rare lesions from intraductal papillary mucinous neoplasms.
authors.affiliation: Institute of Diagnostic Radiology, University Hospital Zurich, Zurich, Switzerland.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Fischer
authors.forename: Olivio
authors.initials: O
authors.lastname: Donati
authors.forename: Stefan
authors.initials: S
authors.lastname: Heinrich
authors.forename: Achim
authors.initials: A
authors.lastname: Weber
authors.forename: Thomas F
authors.initials: TF
authors.lastname: Hany
authors.forename: Davide
authors.initials: D
authors.lastname: Soldini
authors.forename: Hatem
authors.initials: H
authors.lastname: Alkadhi
authors.forename: Borut
authors.initials: B
authors.lastname: Marincek
authors.forename: Hans
authors.initials: H
authors.lastname: Scheffel
mesh_terms: D000368:Aged; D021441:Carcinoma, Pancreatic Ductal / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D002291:Carcinoma, Papillary / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010190:Pancreatic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D015898:Tomography Scanners, X-Ray Computed; D014055:Tomography, Emission-Computed / Q000379:methods; D014463:Ultrasonography
chemical_list: D019788:Fluorodeoxyglucose F18