title: Pancreatic lymphoepithelial cyst with an intracystic papillary projection. Report of a case.
abstract: BACKGROUND
  Lymphoepithelial cysts of the pancreas show various presentations on imaging studies often making a differential diagnosis difficult.
  
  
  METHODS
  A 58-year-old man was admitted to our hospital with epigastric discomfort and abdominal bloating. Abdominal US was carried out and demonstrated a cystic lesion 5 cm in diameter which included an intracystic projection into the pancreatic body. This intracystic projection was also seen on CT and MR images. On FDG-PET images, the projection was positively visualized. Since we could not exclude a pancreatic cystic neoplasm, a distal pancreatectomy was performed. Postoperative pathological examination demonstrated that the lesion was a lymphoepithelial cyst of the pancreas. There were no atypical cells in the intracystic projection.
  
  
  CONCLUSIONS
  Resection is inevitable when a true pancreatic neoplasm cannot be excluded.
authors.affiliation: Department of Surgery, Shizuoka Hospital, Juntendo University School of Medicine, Izu-no-kuni, Shizuoka 410-2295, Japan. hmaekawa0201@gmail.com
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Maekawa
authors.forename: Hisashi
authors.initials: H
authors.lastname: Yoneyama
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Komatsu
authors.forename: Hajime
authors.initials: H
authors.lastname: Orita
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Sakurada
authors.forename: Koichi
authors.initials: K
authors.lastname: Sato
authors.forename: Miki
authors.initials: M
authors.lastname: Yamano
mesh_terms: D002291:Carcinoma, Papillary / Q000473:pathology / Q000601:surgery; D002465:Cell Movement; D004847:Epithelial Cells / Q000473:pathology*; D006801:Humans; D008214:Lymphocytes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010180:Pancreatectomy; D010181:Pancreatic Cyst / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000473:pathology / Q000601:surgery