title: [Endoscopic ultrasonography (EUS) in preoperative localization of neuroendocrine tumors (NET) of the pancreas].
abstract: BACKGROUND
  Preoperative localization of pancreatic neuroendocrine tumours (NET) is usually very difficult. Noninvasive, imaging tests, such as abdominal ultrasound, CT or MRI are not sensitive enough as well as selective angiography. The aim of the study was to clarify the usefulness of the EUS in preoperative localization of the pancreatic NET.
  
  
  METHODS
  From September 1998 March 2005, EUS was performed in 1600 patients. Among them, in 10 (0.7%), this examination was carried out due to previous biochemical tests, which diagnosed the pancreatic NET. We studied the location, the size and echo-pattern of the neoplasm. The results were compared with operation and histology or EUS- FNA guided pancreatic biopsy in 9/10 patients. All EUS examinations were performed using Olympus GIF-130 videoecho-endoscope with 7,5 /12MHz switchable radial probe.
  
  
  RESULTS
  EUS correctly localized the pancreatic NET in 7/8 cases, (sensitivity:87.5%). In 2 patients, EUS accurately exclouded pancreatic NET. There were no false positive findings (specificity 100%). Six tumours were benign (75%), and two were malign (25%). We localized 6 insulinomas and single pancreatic carcinoid tumour. The median tumour size detected by EUS was 21mm.
  
  
  CONCLUSIONS
  EUS is highly accurate in preoperative localization of the pancreatic NET-s and We confirmed it in our study. EUS presents the method of choice for preoperative localization of the pancreatic NET.
authors.affiliation: Institut za bolesti digestivnog sistema KCS, Beograd.
authors.forename: M
authors.initials: M
authors.lastname: Krstić
authors.forename: M
authors.initials: M
authors.lastname: Sumarac
authors.forename: A
authors.initials: A
authors.lastname: Diklić
authors.forename: S
authors.initials: S
authors.lastname: Tatić
authors.forename: A
authors.initials: A
authors.lastname: Pavlović
authors.forename: D
authors.initials: D
authors.lastname: Tomić
authors.forename: D
authors.initials: D
authors.lastname: Micić
authors.forename: A
authors.initials: A
authors.lastname: Kendereski
authors.forename: N
authors.initials: N
authors.lastname: Milinić
authors.forename: M
authors.initials: M
authors.lastname: Petakov
mesh_terms: D019160:Endosonography; D006801:Humans; D018358:Neuroendocrine Tumors / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D012680:Sensitivity and Specificity