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Related Concept Videos

Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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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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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

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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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Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
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Cancer Prevention02:59

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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Endoscopic Studies I: Bronchoscopy and Thoracoscopy01:30

Endoscopic Studies I: Bronchoscopy and Thoracoscopy

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Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
Bronchoscopy
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Bronchoscopy is a procedure that involves direct visualization of the larynx, trachea, and bronchi for diagnostic and therapeutic purposes. A flexible fiber optic or rigid bronchoscope is used to carry out the procedure. The fiber-optic bronchoscope is more frequently used due...
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Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

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Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
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Related Experiment Video

Updated: Mar 6, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists

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Should Screening Colonoscopy Be Offered From Age 50?

Hermann Brenner1, Nadine Zwink, Leopold Ludwig

  • 1Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ, Deutsches Krebsforschungszentrum), Heidelberg, Germany; Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany; German Consortium for Translational Cancer Research (DKTK, Deutsches Konsortium für Translationale Krebsforschung), German Cancer Research Center (DKFZ), Heidelberg, Germany; Gastroenterology and Internal Medicine Practice, Dornstadt, Germany.

Deutsches Arzteblatt International
|March 8, 2017
PubMed
Summary

Colonoscopic screening for individuals aged 50-54 found advanced neoplasia in 6.8% of cases, with higher prevalence in men. This supports extending screening to men aged 50 and older.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Public Health

Background:

  • Colon cancer incidence declined in Germany after 2002 for those 55+, but prevalence in 50-54 year olds was unknown.
  • Expert committees recommend screening from age 50, a service offered by some German health programs since 2014.

Purpose of the Study:

  • To determine the prevalence of colorectal neoplasia in individuals aged 50-54.
  • To assess the utilization and outcomes of colonoscopic screening in this age group.

Main Methods:

  • 84,726 individuals aged 50-54 were invited to colonoscopic screening in 2014-2015.
  • A random subset received a risk questionnaire; participation and findings were analyzed.

Main Results:

  • Colonoscopic screening uptake was 1.9% overall, and 3.3% for those in specialized programs.
  • Advanced neoplasia was detected in 6.8% of colonoscopies, with significantly higher prevalence in men (8.6%) than women (4.5%).
  • Risk questionnaires did not impact participation or detection rates.

Conclusions:

  • The prevalence of advanced neoplasia in 50-54 year olds, particularly men, justifies extending colonoscopic screening recommendations.
  • Screening men aged 50 and above is supported by these findings.