title: Retrospective study of 24 cases of acute appendiceal diverticulitis: CT findings and pathological correlations.
abstract: OBJECTIVE
  Appendiceal diverticulitis is relatively rare and is difficult to distinguish clinically and radiologically from acute appendicitis. The aim of this study was to describe the computed tomography (CT) findings of acute appendiceal diverticulitis.
  
  
  METHODS
  Among the 1329 patients who underwent appendectomy at our institution between January 2010 and July 2015, 28 were diagnosed pathologically with appendiceal diverticulitis, including 24 patients who were evaluated by preoperative CT. The control group consisted of 38 patients without diverticulitis. Average age of patients, ratio of males to females, appendiceal diameter, presence of a diverticulum, diverticular enhancement, peri-appendiceal fat stranding, peri-appendiceal loculated fluid and perforation, and the presence of appendicolith were evaluated retrospectively.
  
  
  RESULTS
  Peri-appendiceal fat stranding (p < 0.005), appendiceal diameter (p < 0.005), and peri-appendiceal loculated fluid differed significantly between the diverticulitis and non-diverticulitis groups (p < 0.005).
  
  
  CONCLUSIONS
  Although relatively uncommon, appendiceal diverticulitis should be included in the differential diagnosis of acute appendicitis. It differs from typical acute appendicitis by the presence of an inflamed diverticulum, seen on CT. These patients are also more likely to have peri-appendiceal extra-luminal loculated fluid, peri-appendiceal fat stranding, and a larger diameter of the appendix. The latter finding is likely due to the increased intraluminal pressure.
authors.affiliation: Department of Radiology, Istanbul Training and Research Hospital, Istanbul, Turkey. yahandeoo@yahoo.com.
authors.forename: Aytul Hande
authors.initials: AH
authors.lastname: Yardimci
authors.affiliation: Department of Radiology, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Ceyda Turan
authors.initials: CT
authors.lastname: Bektas
authors.affiliation: Department of Pathology, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Esra
authors.initials: E
authors.lastname: Pasaoglu
authors.affiliation: Department of General Surgery, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Erdem
authors.initials: E
authors.lastname: Kinaci
authors.affiliation: Department of Radiology, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Cigdem
authors.initials: C
authors.lastname: Ozer
authors.affiliation: Department of General Surgery, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Mert Mahsuni
authors.initials: MM
authors.lastname: Sevinc
authors.affiliation: Department of Radiology, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Abdullah Soydan
authors.initials: AS
authors.lastname: Mahmutoglu
authors.affiliation: Department of Radiology, Istanbul Training and Research Hospital, Istanbul, Turkey.
authors.forename: Ozgur
authors.initials: O
authors.lastname: Kilickesmez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001064:Appendicitis / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D001065:Appendix / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D004238:Diverticulitis / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D055815:Young Adult
keywords: Acute appendicitis; Diverticulitis; MDCT