Upper Gastrointestinal Tract in Inflammatory Bowel Disease

Area of Science:

• Gastroenterology
• Immunology
• Pathology

Background:

• Historically, Crohn's disease (CD) was associated with upper gastrointestinal (GI) involvement, while ulcerative colitis (UC) was considered confined to the colon.
• Emerging evidence indicates that UC can also affect the upper GI tract, particularly the stomach.

Purpose of the Study:

• To review the current understanding of upper GI tract involvement in inflammatory bowel disease (IBD).
• To discuss the immune mechanisms and differential diagnosis of esophageal and gastric inflammation in CD and UC.

Main Methods:

• Literature review of studies on upper GI manifestations in IBD.
• Analysis of immune pathways implicated in esophageal and gastric inflammation associated with CD and UC.

Main Results:

• UC-associated inflammation commonly involves the stomach.
• Both CD and UC are associated with specific esophageal conditions: aphthoid ulcers in CD, and eosinophilic esophagitis and lymphocytic esophagitis in both CD and UC.
• Immune mechanisms contributing to these conditions are explored.

Conclusions:

• Upper GI tract inflammation is a recognized feature in both Crohn's disease and ulcerative colitis.
• Understanding the immune basis and differential diagnosis is crucial for managing IBD patients with upper GI symptoms.