title: Evaluation of the diagnostic accuracy of the endoscopic ultrasonography results in the patients examined in a period of three years.
abstract: BACKGROUND
  Endoscopic ultrasonography (EUS) is a well-established method of evaluating patients with gastrointestinal diseases, especially malignancies. EUS is like other similar endoscopy techniques, based on high frequency ultrasonography. This high level technology allows examination of tissue to almost microscopic level, not only in digestive system but its surrounding structures.
  
  
  OBJECTIVE
  The aim of this study was to determine the contribution of endoscopic experience, based on the number of endosopic ultrasonography examination performed in the three years period, to obtain 80% diagnostic accuracy with staging of the disease in order to achieve a 30-60% change rate in treatment decisions which is accepted standard.
  
  
  RESULTS
  First group with 210 patients was examined in the first year of work; 325 examined in the second year of work and 295 in the third year.
  
  
  METHODS
  Accuracy in the first year of work, were 45% (p<0.001 for the choledocholithiasis; p=0.197 for the pancreatic cancer; p=0.195 for LN detection in the gastric cancer). In the second year of work diagnostic accuracy were 78%/p=0.550 for the choledocholithiasis; p=0.228 for the pancreatic cancer; p=0.503 for LN detection in the gastric cancer/. Diagnostic accuracy in the third year of work were 81%/p<0.001 for the choledocholithiasis; p=0.018 for the pancreatic carcinoma; p=0.042 LN detection in the gastric cancer/.
  
  
  CONCLUSIONS
  Application of Endoscopic ultrasonography in diagnostics, based on number of EUS examination performed, after three years of work, achieved 80% diagnostic accuracy, compared to standard imaging methods and results of surgery in staging of the disease. EUS results made a change in treatment decisions in 30-60% of patients which is world standard and completely justify use of endoscopic ultrasonography in clinical practice.
authors.affiliation: Department of Gastroenterology and Hepatology, Medical Center University of Sarajevo. mesihovicrusmir@hotmail.com
authors.forename: Rusmir
authors.initials: R
authors.lastname: Mesihović
authors.forename: Nened
authors.initials: N
authors.lastname: Vanis
authors.forename: Azra
authors.initials: A
authors.lastname: Husić-Selimović
authors.forename: Dzanela
authors.initials: D
authors.lastname: Prohić
authors.forename: Mehmed
authors.initials: M
authors.lastname: Gribajcević
authors.forename: Haris
authors.initials: H
authors.lastname: Tanović
authors.forename: Serif
authors.initials: S
authors.lastname: Beslić
authors.forename: Fahrudin
authors.initials: F
authors.lastname: Smajlović
authors.forename: Aida
authors.initials: A
authors.lastname: Saray
mesh_terms: D000328:Adult; D000368:Aged; D042883:Choledocholithiasis / Q000000981:diagnostic imaging; D004066:Digestive System Diseases / Q000000981:diagnostic imaging*; D019160:Endosonography; D006801:Humans; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging; D015203:Reproducibility of Results; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging