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Related Concept Videos

Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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.
In gastric emptying studies, a meal's liquid and solid...
Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

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.
Sigmoidoscopy
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Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

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, unexplained...

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Related Experiment Video

Updated: May 10, 2026

Diagnosis of Neoplasia in Barrett&#8217;s Esophagus using Vital-dye Enhanced Fluorescence Imaging
06:55

Diagnosis of Neoplasia in Barrett’s Esophagus using Vital-dye Enhanced Fluorescence Imaging

Published on: May 11, 2014

High resolution microendoscopy for classification of colorectal polyps.

S S Chang1, R Shukla, A D Polydorides

  • 1Department of Internal Medicine, Mount Sinai Hospital, New York 10029, USA.

Endoscopy
|June 20, 2013
PubMed
Summary

High-resolution microendoscopy (HRME) effectively distinguishes neoplastic polyps from benign ones. New HRME criteria improve accuracy and interobserver agreement, offering a cost-effective alternative for colorectal cancer screening.

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Last Updated: May 10, 2026

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Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
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High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging
13:49

High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging

Published on: January 11, 2011

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Pathology

Background:

  • Distinguishing adenomas from benign polyps during colonoscopy is challenging.
  • High-resolution microendoscopy (HRME) offers subcellular detail for colorectal mucosa imaging.
  • No established HRME criteria exist for classifying colorectal neoplasia.

Purpose of the Study:

  • Develop HRME criteria for characterizing colorectal mucosa (normal, hyperplastic polyps, adenomas, cancer).
  • Assess accuracy and interobserver variability of HRME criteria for neoplastic vs. non-neoplastic polyp discrimination.
  • Evaluate performance by both novice and expert microendoscopists.

Main Methods:

  • Expert pathologists established consensus HRME image criteria using data from 68 patients.
  • Expert and novice microendoscopists trained on HRME criteria using a set of images.
  • Trained observers were tested to determine accuracy and interobserver variability.

Main Results:

  • Overall neoplasia identification: 70% sensitivity, 94% specificity, 85% accuracy.
  • Expert microendoscopists achieved 67% sensitivity, 97% specificity, 87% accuracy.
  • Nonexperts achieved 73% sensitivity, 91% specificity, 85% accuracy.
  • Interobserver agreement (Kappa) was substantial: experts 0.86, nonexperts 0.72, overall 0.78.

Conclusions:

  • New HRME criteria enable high specificity and substantial agreement in distinguishing neoplasia from benign polyps.
  • Increased expertise in HRME imaging enhances diagnostic accuracy.
  • HRME presents a low-cost alternative to confocal microendoscopy, particularly in resource-limited settings.