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Crohn disease
- CT:
- "double halo" (50%): edematous mucosa/thickened soft tissue
- "creeping fat" (40%): mesenteric infiltration
- US:
- thickened bowel wall (65%): about 8mm
- inflammatory mass (14%), abscess (4%), distended fluid filled loops (12%)
- Complications: fistula (33%), intramural sinus tracts, abscess,
perforations (rare), toxic megacolon, SBO (15%), hydronephrosis (usually
right sided), adenocarcinoma in ileum/colon
- DDx:
- Yersinia: in TI, resolution in 3-4 months
- TB (more severe involvement of cecum)
- segmental infarction (acute onset, elderly patient)
- radiation ileitis
- lymphoma
- carcinoid
- eosinophilic gastoenteritis
- potassium stricture
see:
Cf: ulcerative colitis
More info:
Crohn disease [OMIM]
Yong H. Hahn, MD - 24 November 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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