title: Ultrasonography in diagnosis of acute appendicitis.
abstract: OBJECTIVE
  Acute appendicitis is the most common surgical abdominal emergency. In the early diagnosis of acute appendicitis, the fact that there is no a sign which could be a reliable indicator in most of the patients increases the complications. In this study we aimed to search the relation between Ultrasonography(US) findings in patients with diagnosis of acute appendicitis and postoperative histopathologic investigation on remoced appendix..
  
  
  METHODS
  The files of 174 patients who came in our emergency department with lower right abdominal pain were studied retrospectively from January 2013 to May 2014. Of them, 26 patients were excluded, because these patients were not studied with US. US findings and histopathology reports of 148 patients with suspected acute appendicitis and studies preoperatively with abdominal US were enrolled. Greater than 6-mm diameter of the appendix under compression was accepted as positive sign of appandicitis in US. The demographic characteristics of the patients, US findings (acut appendicitis or not) and the pathology results were recorded on the standard proform.
  
  
  RESULTS
  Of these 148 patients, 100 were acute appendicitis in preoperative US, and of these 100 patients, 93 histopathologic reports were acute appendicitis, 7 were normal appendices. The sensitivity of US was 75.6 % and specificity was 72 %. Positive predictive value (PPV) was 93 %, negative predictive value (NPV) was 14.6 % and the accuracy of US value was 81.7%. As a result, although US in diagnosis of acute appendicitis is a reliable technique, negative result doesn't mean no acute appendicitis. In order to determine an accurate diagnosis of acute appendicitis clinical and laboratoary findings should be assessed together.
  
  
  BACKGROUND
  Abdominal pain, Acute appendicitis, Ultrasonography.
authors.forename: Faik
authors.initials: F
authors.lastname: Tatli
authors.forename: Ugur
authors.initials: U
authors.lastname: Ekici
authors.forename: Murat
authors.initials: M
authors.lastname: Kanlioz
authors.forename: Orhan
authors.initials: O
authors.lastname: Gozeneli
authors.forename: Ali
authors.initials: A
authors.lastname: Uzunkoy
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Yucel
authors.forename: Abuzer
authors.initials: A
authors.lastname: Dirican
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001064:Appendicitis / Q000000981:diagnostic imaging*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014463:Ultrasonography; D055815:Young Adult