Fig. 2A.32-year-old man with abdominal pain, fever, elevated WBC
count, and diarrhea. Stool assay was positive for Clostridium
difficile toxin. Axial CT scan shows extensive nodular wall thickening
(arrows) throughout transverse colon. Lines of high attenuation are
from oral contrast material trapped between nodular bowel wall folds that
produce "accordion" sign.
Fig. 2B.32-year-old man with abdominal pain, fever, elevated WBC
count, and diarrhea. Stool assay was positive for Clostridium
difficile toxin. Axial CT scan through pelvis reveals nodular thickening
(arrow) within sigmoid colon.
Fig. 3.55-year-old man with bloody diarrhea and abdominal pain.
Stool assay was negative for Clostridium difficile toxin. Note fairly
symmetric wall thickening of ascending and descending colon (arrow),
with only minimal pericolonic reaction (arrowhead) and no ascites.
Although initial diagnosis on CT was C. difficile colitis, endoscopic
biopsy showed ulcerative colitis.