| Stenosis | ||
 |
 |
|
| Extensive pancolitis with multiple inflammatory stenosis. To the left a pseudopolyp is protruding into the stenosis. | ||
| Recurrent colitis with stenosis | ||
 |
 |
|
| Severe recurrent ulcerative colitis. The stenosis narrows a considerable length of the sigmoid colon (left picture). The surrounding colon harbours purulent ulcerations (right image). | ||
