Inflammatory Bowel Disease = Crohn’s disease and Ulcerative Colitis.

Crohn’s Disease

• Mouth to anus
• Skip areas
• Full thickness
• Anal involvement common (fistulas, abscess, fissures, ulcers)
• Cancer risk less than that of ulcerative colitis

Ulcerative Colitis

• Bloody diarrhea
• Colon only
• Anal involvement is rare
• Always involves the rectum and spreads proximally (no skips)
• mucosa, submucosa (not full thickness)
• 20% risk of colon cancer after 20 years of disease