title: Solitary cystic tumor of the pancreas: EUS-pathologic correlation.
abstract: BACKGROUND
  It is clinically important to distinguish neoplastic from non-neoplastic pancreatic cysts.
  
  
  METHODS
  Retrospective correlations were made between pathologic and EUS data from 52 pancreatic solitary cystic tumors: mucinous cystadenoma (10), mucinous cystadenocarcinoma (7), serous cystadenoma (5), ductectatic mucinous cystic tumor (10), solid and papillary epithelial neoplasm (5), and non-neoplastic cyst (15). The mean tumor size was 3.5 cm (range, 1.2 cm to 6.0 cm).
  
  
  RESULTS
  Six classifications of the internal structures of these cysts were developed: thick wall type, tumor protruding type, thick septal type, microcystic type, thin septal type, and simple type. Although all neoplastic cysts belonged to the first four types, all non-neoplastic cysts belonged to the last two types. The accuracy of EUS for differentiating tumors was estimated at 96% and 92%, respectively, by two observers.
  
  
  CONCLUSIONS
  EUS may become a mandatory modality for differentiating pancreatic solitary cystic tumors and choosing an optimal treatment.
authors.affiliation: Department of Radiology, Sapporo Medical University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Koito
authors.forename: T
authors.initials: T
authors.lastname: Namieno
authors.forename: T
authors.initials: T
authors.lastname: Nagakawa
authors.forename: T
authors.initials: T
authors.lastname: Shyonai
authors.forename: N
authors.initials: N
authors.lastname: Hirokawa
authors.forename: K
authors.initials: K
authors.lastname: Morita
mesh_terms: D000230:Adenocarcinoma / Q000145:classification / Q000175:diagnosis*; D000236:Adenoma / Q000145:classification / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D019160:Endosonography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010179:Pancreas / Q000473:pathology; D010181:Pancreatic Cyst / Q000145:classification / Q000175:diagnosis*; D010190:Pancreatic Neoplasms / Q000145:classification / Q000175:diagnosis*; D010192:Pancreatic Pseudocyst / Q000145:classification / Q000175:diagnosis; D012189:Retrospective Studies; D012680:Sensitivity and Specificity