Crohn's disease of the small intestine.

The small bowel remains the most frequent site of inflammation in Crohn's disease, involving 75 to 85 per cent of all patients. In spite of the advent of newer imaging modalities and the increasing sophistication of endoscopy, barium studies remain the primary method of diagnosis and evaluation of small bowel Crohn's disease. It is important not only to detect the presence of disease, but also to give a correct anatomic distribution as well as identify possible complications.