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Related Concept Videos

Anatomy of the Gastrointestinal System01:26

Anatomy of the Gastrointestinal System

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The human digestive system is an intricate and essential network for nutrient absorption and waste elimination. It encompasses the gastrointestinal (GI) tract and several accessory organs.
Here's a detailed walkthrough of this complex system:
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Histology of the Gastrointestinal (GI) Tract01:20

Histology of the Gastrointestinal (GI) Tract

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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...
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Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

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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...
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Physiology of the Gastrointestinal System I: Ingestion and Propulsion01:22

Physiology of the Gastrointestinal System I: Ingestion and Propulsion

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The physiology of the gastrointestinal system begins with ingestion as food enters the mouth.
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Physiology of the Gastrointestinal System II: Digestion and Absorption01:22

Physiology of the Gastrointestinal System II: Digestion and Absorption

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The gastrointestinal (GI) tract, extending from the mouth to the anus, plays a pivotal role in the digestion and absorption of nutrients. This process involves both mechanical and chemical actions facilitated by various enzymes.
Digestion begins in the mouth, where food undergoes mechanical breakdown by chewing and combines with saliva. Salivary amylase, an enzyme in saliva, starts the breakdown of starches into maltose. The food then travels down the esophagus to the stomach.
In the stomach, a...
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Physiology of the Gastrointestinal System III: Elimination01:26

Physiology of the Gastrointestinal System III: Elimination

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The gastrointestinal elimination process involves a complex interplay of neural and hormonal mechanisms that coordinate the final waste removal from the body. This intricate operation encompasses the absorption of water and electrolytes, vital for transforming the remaining indigestible food matter into feces. The large intestine is pivotal in water and electrolyte absorption, forming feces from unabsorbed minerals, undigested food, bacteria, bile pigments, and shed epithelial cells. Essential...
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Related Experiment Video

Updated: Jan 21, 2026

Laparoscopy-endoscopy Cooperative Surgery for the Treatment of Gastric Gastrointestinal Stromal Tumors
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Laparoscopy-endoscopy Cooperative Surgery for the Treatment of Gastric Gastrointestinal Stromal Tumors

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Primary prostatic extra-gastrointestinal stromal tumor causing giant prostatomegaly.

Gaurav Garg1, Ashish Sharma1, Satya Narayan Sankhwar1

  • 1Department of Urology, KGMU, Lucknow, Uttar Pradesh, India.

Indian Journal of Urology : IJU : Journal of the Urological Society of India
|August 2, 2019
PubMed
Summary

Prostatic extra-gastrointestinal stromal tumors (E-GIST) are rare. This case highlights an E-GIST causing massive prostate enlargement, emphasizing its consideration in differential diagnoses for lower urinary tract symptoms.

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Area of Science:

  • Urologic Oncology
  • Gastrointestinal Stromal Tumors
  • Mesenchymal Neoplasms

Background:

  • Extra-gastrointestinal stromal tumors (E-GIST) are rare mesenchymal neoplasms.
  • Fewer than 10 cases of prostatic E-GIST have been reported globally.

Observation:

  • A 55-year-old male presented with lower urinary tract symptoms (LUTS).
  • Diagnostic workup revealed a massive prostatic enlargement (1230 cc) due to localized E-GIST.

Findings:

  • The patient received Imatinib mesylate therapy due to surgical risks.
  • This treatment approach was selected for the rare prostatic E-GIST case.

Implications:

  • Prostatic E-GIST should be considered in the differential diagnosis of patients with LUTS.
  • Recognition of this rare entity can significantly influence patient management and treatment decisions.