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Related Concept Videos

Histology of the Gastrointestinal (GI) Tract01:20

Histology of the Gastrointestinal (GI) Tract

The GI tract, from beginning to end, is made up of four continuous tissue layers that adjust their structure according to their specific roles. These layers, from innermost to outermost, are known as the mucosa, submucosa, muscularis, and serosa, which are continuous with the mesentery.
The mucosa is sometimes called a mucous membrane due to its mucus-secreting features. This membrane is composed of epithelium, which directly interacts with ingested substances, and the lamina propria, a layer...
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...
Stomach Histology01:26

Stomach Histology

The stomach comprises several layers that work together to facilitate digestion and protect the organ. The outermost layer is called the serosa, which provides support and protection to the stomach. The muscularis externa layer is responsible for the mechanical breakdown of food by contracting and moving the stomach. The submucosa layer, located beneath the muscularis externa, contains connective tissue, blood vessels, nerves, and glands that secrete mucus and other substances essential for...

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Related Experiment Video

Updated: May 19, 2026

Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor
07:21

Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor

Published on: May 2, 2022

[Gastrointestinal stromal tumor].

Markku Miettinen1

  • 1Laboratory of Pathology National Cancer Institute/NIH, Bethesda, Maryland, USA.

Duodecim; Laaketieteellinen Aikakauskirja
|September 4, 2012
PubMed
Summary

Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the GI tract. Understanding their distinct nature and new pathogenic pathways, like succinate dehydrogenase deficiency, is crucial for accurate diagnosis and treatment.

Area of Science:

  • Gastrointestinal oncology
  • Molecular pathology
  • Gastrointestinal stromal tumors (GIST)

Context:

  • GIST is the most common mesenchymal tumor in the gastrointestinal tract.
  • GIST is a significant focus in targeted cancer therapy, particularly with tyrosine kinase inhibitors.
  • Accurate GIST diagnosis is increasingly critical for patient management.

Purpose:

  • To highlight the evolving understanding of GIST classification and pathogenesis.
  • To emphasize the importance of precise diagnostic methods for GIST.
  • To introduce novel insights into GIST etiology, including succinate dehydrogenase deficiency.

Summary:

  • Gastrointestinal stromal tumors (GIST) are the most frequent mesenchymal tumors originating in the GI tract.
  • Previously categorized differently, GISTs are now recognized as a distinct tumor entity.

Related Experiment Videos

Last Updated: May 19, 2026

Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor
07:21

Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor

Published on: May 2, 2022

  • A subset of GIST (5%) involves loss of succinate dehydrogenase, linked to early disease onset.

    • Impact:

    • Improved diagnostic accuracy for GIST.
    • Enhanced understanding of GIST pathogenesis, particularly in early-onset cases.
    • Potential for refined targeted therapies based on new etiological insights.