title: Computed Tomographic Findings of Enterohemorrhagic Escherichia coli O157 Infection: An Analysis of a 7-Case Regional Outbreak.
abstract: OBJECTIVE
  We experienced an outbreak of enterohemorrhagic Escherichia coli (EHEC) colitis. The purpose of this study was to reveal the computed tomographic (CT) findings on EHEC colitis.
  
  
  METHODS
  The subjects were 7 patients with EHEC colitis, which was caused by eating a contaminated Japanese rice cake. Contrast CT was performed on all patients. Two radiologists evaluated the CT findings (the thickness of colon wall, the range of thickened colon, and the existence of dirty fat signs around the colon, ascites, and swelling of lymph nodes), in accordance with our PACS system.
  
  
  RESULTS
  Wall swelling of the proximal colon from cecum to ascending colon was noted in all patients. Small intestine lesions were not noted in any cases.
  
  
  CONCLUSIONS
  We should consider EHEC infection as part of a differential diagnosis when the findings of severe right colitis are seen without enteritis.
authors.affiliation: From the *Department of Diagnostic Radiology, Yamagata University Faculty of Medicine; †Department of Diagnostic Radiology, Yamagata Prefectural Central Hospital; and ‡Department of Gastroenterology, Yamagata University Faculty of Medicine, Yamagata, Japan.
authors.forename: Toshitada
authors.initials: T
authors.lastname: Hiraka
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kanoto
authors.forename: Yukio
authors.initials: Y
authors.lastname: Sugai
authors.forename: Tsuguo
authors.initials: T
authors.lastname: Honma
authors.forename: Naohiko
authors.initials: N
authors.lastname: Makino
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Ueno
authors.forename: Takaaki
authors.initials: T
authors.lastname: Hosoya
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003092:Colitis / Q000000981:diagnostic imaging* / Q000453:epidemiology* / Q000382:microbiology; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D004927:Escherichia coli Infections / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D019453:Escherichia coli O157; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D055815:Young Adult