title: Appendiceal diverticulitis: multidetector CT features.
abstract: OBJECTIVE
  Appendiceal diverticulitis has been difficult to distinguish from acute appendicitis clinically and radiologically. The purpose of this study was to describe multidetector computed tomography (MDCT) features of cases of pathologically proved appendiceal diverticulitis at our institution over a 36-month period.
  
  
  METHODS
  Seven of 156 patients who underwent appendectomy with the preoperative diagnosis of acute appendicitis were pathologically diagnosed with appendiceal diverticulitis. Two radiologists reviewed the MDCT images for these 7 patients.
  
  
  RESULTS
  On MDCT, a total of 8 inflamed diverticula were visualized as small fluid-filled luminal structures with thick enhanced walls or as solid enhanced masses protruding from the appendix for 6 of 7 patients. For 2 of these 6 patients, MDCT revealed a total of 5 normal diverticula visualized as small air-filled luminal structures with thin walls. For 1 of the 7 patients, neither inflamed or normal diverticula could be identified on MDCT. MDCT revealed appendiceal wall thickening with a tiny or no luminal fluid collection for 5 patients and with a moderate fluid collection for 1 patient, and a normal appendiceal wall for 1 patient.
  
  
  CONCLUSIONS
  Our results suggest that MDCT can reveal appendiceal diverticula and has potential in the preoperative diagnosis of appendiceal diverticulitis.
authors.affiliation: Department of Radiology, Saitama Medical Center, Saitama Medical School, 1981 Kamoda, Kawagoe, Saitama 350-8550, Japan. osada@saitama-med.ac.jp
authors.forename: Hisato
authors.initials: H
authors.lastname: Osada
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ohno
authors.forename: Kazuho
authors.initials: K
authors.lastname: Saiga
authors.forename: Wataru
authors.initials: W
authors.lastname: Watanabe
authors.forename: Takemichi
authors.initials: T
authors.lastname: Okada
authors.forename: Norinari
authors.initials: N
authors.lastname: Honda
mesh_terms: D000328:Adult; D001062:Appendectomy; D001064:Appendicitis / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D003287:Contrast Media; D003937:Diagnosis, Differential; D004238:Diverticulitis / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D007472:Iohexol; D007479:Iopamidol; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography
chemical_list: D003287:Contrast Media; D007472:Iohexol; D007479:Iopamidol