A 55-year-old woman presents with a 2-month history of abdominal discomfort, anorexia, and frequent bowel movements after being treated for rectal carcinoma.

Fig. 112.1 (A,B) Axial images from a contrast CT scan show thickening pelvic small bowel loops with loss of normal folds. (C) Small bowel barium series demonstrates deep ulcers in the small bowel, mucosal edema, and strictures.

Radiation enteritis

• Bacterial enteritis
• Inflammatory bowel disease