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Related Concept Videos

Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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Introduction
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...
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Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

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Introduction
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...
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Inflammatory Bowel Disease I: Introduction01:26

Inflammatory Bowel Disease I: Introduction

79
Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows...
79
Inflammatory Bowel Disease II: Ulcerative Colitis01:20

Inflammatory Bowel Disease II: Ulcerative Colitis

57
Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal...
57
Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

69
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
69
Inflammatory Bowel Disease IV: Clinical Manifestations01:20

Inflammatory Bowel Disease IV: Clinical Manifestations

64
Inflammatory bowel disease (IBD) encompasses two major chronic disorders—ulcerative colitis and Crohn’s disease—each characterized by relapsing episodes of gastrointestinal inflammation. Although they share certain clinical features, their patterns of involvement and manifestations differ in ways that aid diagnosis and guide management.Ulcerative ColitisUlcerative colitis is limited to the colon and rectum and involves continuous inflammation of the mucosal layer. The...
64

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Related Experiment Video

Updated: May 6, 2026

Non-invasive Assessment of the Efficacy of New Therapeutics for Intestinal Pathologies Using Serial Endoscopic Imaging of Live Mice
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Non-invasive Assessment of the Efficacy of New Therapeutics for Intestinal Pathologies Using Serial Endoscopic Imaging of Live Mice

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Intestinal inflammation and cancer.

Thomas A Ullman1, Steven H Itzkowitz

  • 1The Dr Henry D. Janowitz Division of Gastroenterology, Mount Sinai School of Medicine, New York, New York 10029, USA.

Gastroenterology
|May 3, 2011
PubMed
Summary

Chronic inflammation in inflammatory bowel disease (IBD) significantly increases colorectal cancer (CRC) risk. Genetic changes linked to CRC occur early in inflamed colonic tissue, suggesting inflammation drives cancer development.

Area of Science:

  • Gastroenterology
  • Oncology
  • Immunology

Background:

  • Inflammatory bowel disease (IBD), including ulcerative colitis and Crohn's disease, elevates colorectal cancer (CRC) risk.
  • Chronic inflammation is a key factor in IBD-associated carcinogenesis.
  • Risk correlates with colitis duration, extent, and co-existing inflammatory conditions like primary sclerosing cholangitis.

Purpose of the Study:

  • To explore the link between chronic inflammation in IBD and the development of colorectal cancer.
  • To investigate the genetic alterations in inflamed colonic mucosa that precede cancer development.
  • To understand the role of oxidative stress and immune responses in colitis-associated CRC.

Main Methods:

  • Review of existing literature on IBD, CRC, inflammation, and genetic alterations.

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  • Analysis of genetic features (instability, hypermethylation) in sporadic and colitis-associated CRC.
  • Examination of the impact of inflammation-reducing drugs on cancer risk.
  • Consideration of experimental models involving rodents and genetically engineered mice.

    • Main Results:

    • Genetic alterations common in sporadic CRC are found in inflamed IBD mucosa before dysplasia.
    • Inflammation-associated factors like oxidative stress and immune responses may drive these genetic changes.
    • Experimental induction of colitis or genetic predisposition accelerates CRC development in animal models.

    Conclusions:

    • Chronic inflammation in IBD plays a critical role in colon carcinogenesis.
    • Early genetic alterations in inflamed tissue support inflammation's role in CRC development.
    • Immune responses and oxidative stress are implicated mechanisms in colitis-associated CRC.