ABSTRACT
Ulcerative colitis [UC] and Crohn's disease [CD] are the two main subtypes of chronic inflammatory bowel diseases [IBD]. Multidetector computed tomography [CT] has been recognized as a promising modality for the evaluation of Crohn's disease and other small-bowel abnormalities. CT enterography differs from routine abdominal CT in that CT enterography uses multidetector CT. [narrow section thickness and reconstruction interval], intravenous contrast material, and large volumes of a neutral oral contrast agent to improve depiction of the small-bowel wall and lumen. In patients with Crohn's disease, CT enterography is increasingly used to detect enteric inflammation in addition to extra-enteric complications. The aim of the work will be directed to identify the role of MSCT in the evaluation of idiopathic inflammatory bowel diseases. The present work included 30 patients suffering from idiopathic inflammatory bowel disease [ulcerative colitis or Crohn's disease. All patients subjected to CT enterography and/or colonography using multi-detector row CT and iso-osmotic mannitol as neutral enteric contrast material and Ileo-colonoscopy and mucosal biopsy. CT findings include abnormal wall thickening [generally 1 cm] with skip areas of colonic stenosis and dilatation. Associated findings include pericolonic fat stranding, fistulas, abscesses, fibro fatty proliferation, and mesenteric adenopathy. Findings such as mural thickening, mural enhancement, increased attenuation of the perienteric fat, and the Comb sign have been reported to indicate active inflammatory Crohn's disease. MSCT is a great diagnostic tool in detecting and assessing early changes of inflammatory bowel disease as well as monitoring the disease progress and evaluating the complication