Imaging Features of Enterohemorrhagic Escherichia coli Colitis
Frank H. Miller1,
Jason J. Ma2 and
Francis J. Scholz3
1
Department of Radiology, Northwestern Memorial Hospital, Northwestern
University Medical School, 676 N. St. Clair St., Ste. 800, Chicago, IL
60611.
2
University of Illinois College of Medicine, 1740 W. Taylor St., Chicago, IL
60612.
3
Lahey Clinic, Medical Center, 41 Mall Rd., Burlington, MA 01805.

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Fig. 1A. 53-year-old febrile man with diarrhea and lower abdominal
pain of 2 days' duration. Patient had bloody and mucous stools of 24-hr
duration. Contrast-enhanced CT scan shows pancolitis with thickened ascending
colon and descending colon with target sign (solid arrows). Note
pericolonic inflammatory changes (open arrows).
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Fig. 1B. 53-year-old febrile man with diarrhea and lower abdominal
pain of 2 days' duration. Patient had bloody and mucous stools of 24-hr
duration. CT scan reveals sigmoid colon (solid arrow) as less
thickened than rest of colon. Note pelvic fluid (open arrow). After
CT examination, patient remembered having eaten a largely uncooked meal
several days before admission.
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Fig. 2A. 63-year-old woman with bloody diarrhea of 3 days' duration
and suspected bowel obstruction. Conventional radiograph shows thumbprinting
in transverse colon (arrows).
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Fig. 2B. 63-year-old woman with bloody diarrhea of 3 days' duration
and suspected bowel obstruction. Contrast-enhanced CT scan shows bowel wall
thickening involving ascending (open arrow), transverse (solid
straight arrow), and descending colons with pericolonic inflammation
(curved arrows). Note target sign of wall of ascending colon
(open arrow).
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Fig. 3. 54-year-old afebrile woman presented with abdominal pain and
bloody diarrhea. CT scan shows thickened colon with target sign (solid
arrows) predominately involving ascending and transverse colons. Note
pericolonic inflammatory changes (open arrow).
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Fig. 4. 21-year-old afebrile man with history of gastroesophageal
reflux and dull right lower quadrant pain. He was suspected to have
appendicitis. Contrast-enhanced CT scan shows inflammation of cecum
(curved solid arrow) and terminal ileum (straight solid
arrow) without evidence of appendicitis. Note pericolonic inflammatory
changes (open arrow). CT findings are similar to typhlitis. Patient
had eaten Chinese food before symptoms and Escherichia coli colitis
developed.
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Fig. 5. 11-year-old boy with diarrhea and bloody stool.
Single-contrast barium enema shows thumbprinting suggesting submucosal edema
involving the cecum (solid arrows) and transverse colon (open
arrows).
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Copyright © 2001 by the American Roentgen Ray Society.