Related Experiment Video
Updated: Jul 12, 2026

Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach
Published on: May 2, 2018
Atypical forms of inflammatory bowel disease: microscopic colitis and pouchitis
M Cruz-Correa1, F M Giardiello, T M Bayless
1Division of Gastroenterology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
This study discusses three atypical colitis conditions: collagenous colitis, lymphocytic colitis, and ileal pouchitis. These inflammatory bowel disorders share symptoms like chronic watery diarrhea and affect middle-aged individuals.
Area of Science:
- Gastroenterology
- Internal Medicine
- Pathology
Background:
- Collagenous colitis and lymphocytic colitis are idiopathic inflammatory bowel disorders.
- These conditions manifest with chronic watery diarrhea, typically in middle-aged adults.
- Ileal pouchitis represents a significant long-term complication following ileoanal pouch anastomosis surgery.
Purpose of the Study:
- To review the clinical and histological features of three atypical colitis entities.
- To discuss the management strategies for collagenous colitis, lymphocytic colitis, and ileal pouchitis.
- To provide a comprehensive overview of these distinct gastrointestinal conditions.
Main Methods:
- Literature review of clinical presentations.
- Histological feature analysis.
- Discussion of current management guidelines.
Main Results:
- Collagenous and lymphocytic colitis present similarly with chronic diarrhea.
- Pouchitis is a key complication in patients with ileoanal pouches.
- Distinct histological findings differentiate these colitides.
Conclusions:
- Understanding the unique features of these atypical colitides is crucial for diagnosis.
- Appropriate management can improve outcomes for patients with these conditions.
- Further research into the etiology of collagenous and lymphocytic colitis is warranted.
Related Concept Videos
Chronic Bowel Disorders: Introduction
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Inflammatory Bowel Disease I: Ulcerative Colitis
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
Inflammatory Bowel Disease II: Crohn's Disease
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by transmural...
Inflammatory Bowel Disease I: Introduction
Inflammatory Bowel Disease II: Ulcerative Colitis
Inflammatory Bowel Disease III: Crohn's Disease

