Crohn disease: sites

• esophagus: rare
• stomach (2-20%): granulomatous gastritis
  • pseudo-post Bilroth-I appearance
  • "ramshorn sign"
  • antral-duodenal fistula
• duodenum (4-10%):
  • almost always associated with gastric involvement
  • bulb and proximal half of duodenum
• small bowel (80%): regional enteritis
  • terminal ileum (alone/in combination): 95%
  • jejunum/ileum: 15%
  • commonly associated with medial cecal defect
• colon (22-55%): granulomatous colitis
  • particularly on the right side
  • "transverse stripe sign": contrast within coarse mucosal folds
• rectum (35-50%)

see: Crohn disease

© 2002, C.E. Kahn, Jr.
2002-04-18