Crohn Disease

FIG. 2.62. Crohn disease. <bold>A:</bold> Fat-suppressed T2-weighted image of lower abdomen demonstrates thickening and increased signal intensity of left colon (<italic>arrow</bold>) in patient with active Crohn disease. <bold>B:</bold> Non–fat-suppressed coronal HASTE image of same patient as <bold>(A)</bold> demonstrates colon wall thickening (<italic>arrow</bold>), but lack of fat suppression limits assessment of edema and fluid.

FIGURE 93.5. Crohn’s disease of the terminal ileum demonstrated by severe narrowing of the terminal ileum (as shown between the two <italic>arrows</bold>). The cecum is represented by the “C.”

<bold>Fig GI 19-6 Crohn's disease.</bold> Severe postbulbar narrowing with distal fold thickening.

<bold>Fig GI 27-14 Crohn's disease.</bold> Multiple polypoid lesions in the distal jejunum and proximal ileum show both smooth and lobulated contours.³¹

<bold>FIGURE 39-4</bold> Crohn disease. The mucosal surface of the colon displays a "cobblestone" appearance owing to the presence of linear ulcerations and edema and inflammation of the intervening tissue.

<bold>FIGURE 51.1</bold> Mucosal ulcerations (<italic>arrows</bold>) in Crohn disease of the small bowel.

<bold>FIGURE 51.2</bold> Islands of edematous mucosa surrounded by linear ulceration showing the classic "cobblestone" appearance of Crohn disease.

<bold>FIGURE 51.3</bold> Severe Crohn disease affecting the terminal ileum (<italic>white arrow</bold>) with normal ileum for comparison (<italic>black arrow</bold>).

<bold>FIGURE 51.12</bold> Crohn disease of the ileum (<italic>arrow</bold>) as seen laparoscopically.