title: Appendiceal diverticulitis: diagnosis and differentiation from usual acute appendicitis using computed tomography.
abstract: OBJECTIVE
  To describe the computed tomographic findings of appendiceal diverticulitis.
  
  
  METHODS
  Computed tomography (n = 20) and clinical findings in 23 patients with appendiceal diverticulitis were retrospectively reviewed and compared with those in 23 patients with usual acute appendicitis.
  
  
  RESULTS
  Computed tomography visualized the inflamed diverticula (up to 4 per patient) mostly as small (median, 7.5 mm) round cystic outpouchings at the distal appendix with contrast enhancement at the cyst wall in 16 (80%) patients with appendiceal diverticulitis. In 50% of appendiceal diverticulitis patients, computed tomographic diagnosis of accompanying appendicitis was false positive. Appendicolith was rarely observed in the appendiceal diverticulitis group (5% vs 48%, P = 0.002). No significant difference was observed in the clinical findings except for the patient age (median, 45 vs 31 years; P = 0.001).
  
  
  CONCLUSIONS
  Most appendiceal diverticulitis can be differentiated from usual acute appendicitis at computed tomography by visualization of the inflamed diverticulum.
authors: Department of Radiology, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do, Korea.
authors: Kyoung Ho
authors: KH
authors: Lee
authors: Hye Seung
authors: HS
authors: Lee
authors: Seong Ho
authors: SH
authors: Park
authors: Vasundhara
authors: V
authors: Bajpai
authors: Yoo Shin
authors: YS
authors: Choi
authors: Sung-Bum
authors: SB
authors: Kang
authors: Kil Joong
authors: KJ
authors: Kim
authors: Young Hoon
authors: YH
authors: Kim
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D001064:Appendicitis / Q000000981:diagnostic imaging*; D001065:Appendix / Q000000981:diagnostic imaging* / Q000473:pathology; D002648:Child; D003287:Contrast Media; D003937:Diagnosis, Differential; D004238:Diverticulitis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D008297:Male; D008875:Middle Aged; D011897:Random Allocation; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide