crohn diseasemedical dictionary

<radiology> CT: double halo (50%): oedematous mucosa/thickened soft tissue, creeping fat (40%): mesenteric infiltration, ultrasound: 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, Differential diagnosis: Yersinia: in TI, resolution in 3-4 months, TB (more severe involvement of caecum), segmental infarction (acute onset, elderly patient), radiation ileitis, lymphoma, carcinoid, eosinophilic gastoenteritis, potassium stricture see: sites, phases, extraintestinal manifestations Cf: ulcerative colitis More info: Crohn disease

(12 Dec 1998)