title: Detection and tumor staging of malignancy in cystic, intraductal, and solid tumors of the pancreas by EUS.
abstract: BACKGROUND
  EUS can provide detailed imaging of pancreatic malignancies and direct fine needle aspiration (FNA) of pancreatic masses. The ability of EUS to detect and stage malignancy in cystic and intraductal lesions has not been investigated. Our aim was to determine the sensitivity and specificity of EUS imaging and FNA in detecting and staging of malignancy in solid, cystic, and intraductal lesions of the pancreas.
  
  
  METHODS
  The records of 96 patients (46 solid, 26 cystic, 24 intraductal lesions) who underwent EUS followed by surgical exploration over a 3-year period were reviewed. The accuracy of EUS for detecting and staging malignancy was calculated based on the results of surgery and histology.
  
  
  RESULTS
  EUS-guided FNA provided evidence of malignancy in solid, cystic, and ductal lesions with sensitivities of 59.5%, 50%, and 60%, respectively. The accuracy of staging by EUS was significantly less for intraductal lesions (47%), compared with cystic (100%) and solid lesions (85%) (p < 0. 05).
  
  
  CONCLUSIONS
  EUS can be used to detect malignancy in cystic and intraductal tumors of the pancreas.
authors.affiliation: Department of Medical Services, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
authors.forename: S L
authors.initials: SL
authors.lastname: Brandwein
authors.forename: J J
authors.initials: JJ
authors.lastname: Farrell
authors.forename: B A
authors.initials: BA
authors.lastname: Centeno
authors.forename: W R
authors.initials: WR
authors.lastname: Brugge
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D000328:Adult; D000368:Aged; D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D019160:Endosonography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010181:Pancreatic Cyst / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging / Q000473:pathology*; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D011237:Predictive Value of Tests; D011336:Probability; D011379:Prognosis; D012189:Retrospective Studies; D012680:Sensitivity and Specificity