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Related Concept Videos

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers,...
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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Related Experiment Video

Updated: Jun 11, 2025

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Imaging colonic polyps in 2024.

Kayal Vizhi Nagarajan1, Naresh Bhat2

  • 1Department of Gastroenterology, Hepatology and Clinical Nutrition, Aster CMI Hospital, Bengaluru, 560 092, India.

Indian Journal of Gastroenterology : Official Journal of the Indian Society of Gastroenterology
|September 30, 2024
PubMed
Summary

Effective colorectal cancer screening relies on colonoscopy and polypectomy. Training in polyp detection and characterization using advanced endoscopy is crucial for accurate diagnosis and management, especially with rising polyp and cancer trends.

Keywords:
Characterization of polypsColonic polypsDetection of polypsDye-based chromoendoscopyHigh-grade dysplasiaImaged-enhanced endoscopySub-mucosal invasion

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Area of Science:

  • Gastroenterology and Endoscopy
  • Oncology
  • Medical Training

Background:

  • Colorectal cancer (CRC) incidence and mortality are decreasing due to screening colonoscopy and polypectomy.
  • Despite a historically low incidence in India, CRC and colonic polyp rates have risen recently.
  • Optimal management of colonic polyps necessitates enhanced detection and characterization skills.

Purpose of the Study:

  • To emphasize the importance of adequate training in detecting and characterizing colonic polyps.
  • To outline methods for improving polyp detection during colonoscopy.
  • To discuss techniques for real-time polyp characterization to guide management strategies.

Main Methods:

  • Adherence to colonoscopy standards: bowel preparation, cecal intubation, withdrawal time, and distal attachment devices.
  • Utilizing high-definition-white light endoscopy and image-enhanced endoscopy (dye-based or digital) for polyp characterization.
  • Analyzing polyp features: size, location, morphology, pit pattern, vascular, and surface patterns to predict histology.

Main Results:

  • Polyp detection rates increase with adherence to colonoscopy best practices.
  • Image-enhanced endoscopy aids in differentiating neoplastic from non-neoplastic polyps with reasonable accuracy.
  • Accurate prediction of advanced pathology (high-grade dysplasia, submucosal invasion) is vital for determining endotherapy suitability.

Conclusions:

  • Improved training in polyp detection and characterization using advanced endoscopic technologies is essential.
  • Image-enhanced endoscopy, including narrow band imaging and blue laser imaging, is critical for assessing advanced polyp pathology.
  • Emerging technologies like endocytoscopy and artificial intelligence represent the future of gastrointestinal endoscopy.