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- Follows administration of antibiotics
- Clindamycin, lincomycin
- Clostridium difficile commonly seen
Abdominal radiograph
- Abnormal in 1/3 cases
- Colonic dilatation (32%)
- Thumbprinting
- Thickened haustra
- Abnormal mucosa (18%)
- Transverse colon is most commonly affected, whole colon often involved
CT
- Normal in 39% cases
- Markedly thickened mucosa
- Edema in submucosa
- Nodular mucosal thickening
- Accordion sign
- Mild pericolonic fat inflammatory change
- Ascites in 40% cases
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