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Related Concept Videos

Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
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: Introduction01:26

Inflammatory Bowel Disease I: Introduction

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 “skip lesions” in which...
Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

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...
Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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...
Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...

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[Gastrointestinal polyposis syndromes].

Der Internist·2020
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Dye chromoendoscopy leads to a higher adenoma detection in the duodenum and stomach in patients with familial adenomatous polyposis.

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Related Experiment Video

Updated: May 23, 2026

Chronic Salmonella Infection Induced Intestinal Fibrosis
08:40

Chronic Salmonella Infection Induced Intestinal Fibrosis

Published on: September 22, 2019

[Gastrointestinal polyposis syndromes].

I Spier1, S Aretz

  • 1Institut für Humangenetik, Biomedizinisches Zentrum, Universitätsklinikum Bonn.

Der Internist
|March 21, 2012
PubMed
Summary

Hereditary polyposis syndromes, often linked to extracolonic tumors, require accurate diagnosis through endoscopy and histology. Genetic screening is crucial for identifying specific conditions like familial adenomatous polyposis (FAP) and MUTYH-associated polyposis (MAP).

Area of Science:

  • Gastroenterology and Genetics
  • Oncology
  • Hereditary Cancer Syndromes

Context:

  • Hereditary gastrointestinal polyposis syndromes represent approximately 1% of colorectal cancers and are frequently associated with extracolonic tumors.
  • Diagnosis relies initially on endoscopic visualization and polyp histology.
  • Similar phenotypes can arise from different genetic conditions, necessitating precise molecular genetic screening.

Purpose:

  • To highlight the diagnostic challenges in hereditary polyposis syndromes, including differentiating between autosomal dominant familial adenomatous polyposis (FAP) and autosomal recessive MUTYH-associated polyposis (MAP).
  • To emphasize the importance of molecular genetic screening for accurate classification and risk assessment.
  • To underscore the need for early detection and precise classification of polyposis syndromes for effective management.

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

Published on: March 10, 2015

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format
05:58

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format

Published on: August 20, 2018

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Last Updated: May 23, 2026

Chronic Salmonella Infection Induced Intestinal Fibrosis
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Chronic Salmonella Infection Induced Intestinal Fibrosis

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

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Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format
05:58

Digital Polymerase Chain Reaction Assay for the Genetic Variation in a Sporadic Familial Adenomatous Polyposis Patient Using the Chip-in-a-tube Format

Published on: August 20, 2018

Summary:

  • Initial diagnosis of hereditary polyposis involves endoscopic findings and polyp histology.
  • Molecular genetic screening is vital for distinguishing conditions like FAP and MAP and for evaluating recurrence risks.
  • Diagnostic difficulties arise from overlapping clinical features and histological uncertainties, particularly in hamartomatous polyposes and poorly defined syndromes.

Impact:

  • Accurate genetic identification enables precise recurrence risk evaluation for families and predictive testing for at-risk individuals.
  • Early and accurate classification of polyposis syndromes is essential for implementing effective surveillance and treatment strategies.
  • Improved diagnostic approaches can lead to better patient outcomes and management of associated extracolonic tumors.