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Related Concept Videos

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...
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...
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...
Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...

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Related Experiment Video

Updated: May 31, 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 tumors].

Marco Pericoli Ridolfini1, Alessandra Cassano, Riccardo Ricci

  • 1Dipartimento di Chirurgia Oncologica, Università Cattolica del Sacro Cuore, Centro di Ricerca e Formazione ad Alta Tecnologia nelle Scienze Biomediche Giovanni Paolo II, Campobasso. marco.pericoliridolfini@rm.unicatt.it

Annali Italiani Di Chirurgia
|June 22, 2011
PubMed
Summary

Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the GI tract. This review covers GIST epidemiology, diagnosis, and treatment, including challenges with imatinib resistance.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Pathology

Background:

  • Gastrointestinal stromal tumors (GIST) represent 1% of all gastrointestinal neoplasms and are the most common mesenchymal tumors of the GI tract.
  • Originating from intestinal cells of Cajal, GISTs typically express KIT protein and most commonly occur in the stomach and small intestine.
  • GISTs exhibit variable clinical behaviors, ranging from benign to malignant, with unpredictable outcomes.

Purpose of the Study:

  • To review the epidemiology, pathophysiology, diagnosis, therapy, and prognostic factors of GIST.
  • To highlight diagnostic challenges due to vague symptoms and non-specific traditional tests.
  • To discuss current treatment standards and emerging challenges like imatinib resistance.

Main Methods:

  • Literature review of salient features of GIST.
  • Synthesis of information on epidemiology, pathophysiology, diagnosis, therapy, and prognostic factors.
  • Discussion of surgical and pharmacological treatment modalities.

Main Results:

  • GISTs are characterized by KIT protein expression and common locations in the stomach and small intestine.
  • Diagnosis can be challenging due to non-specific symptoms and tests.
  • Surgery is standard for localized GIST; imatinib is standard for metastatic disease, though resistance is a growing issue.

Conclusions:

  • GIST management requires understanding its diverse nature, from diagnosis to treatment.
  • Addressing imatinib resistance with novel tyrosine kinase inhibitors is crucial for improving patient outcomes.
  • Further research into prognostic factors and therapeutic strategies is essential for effective GIST treatment.