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Related Concept Videos

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.
Sigmoidoscopy
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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Endoscopic Procedures II: Colonoscopy01:25

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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

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

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An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
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Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...
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Related Experiment Video

Updated: Apr 26, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Concerns and challenges in flexible sigmoidoscopy screening.

Akeem O Adebogun, Christine D Berg, Adeyinka O Laiyemo

    Colorectal Cancer
    |July 29, 2014
    PubMed
    Summary

    Flexible sigmoidoscopy (FS) significantly reduces colorectal cancer (CRC) mortality. This endoscopic screening method, proven in trials, is reviewed for its historical impact and future potential in population-based CRC screening.

    Area of Science:

    • Gastroenterology
    • Preventive Medicine
    • Oncology

    Background:

    • Colorectal cancer (CRC) mortality can be reduced through endoscopic screening.
    • Early studies demonstrated significant mortality reduction with sigmoidoscopy.
    • Advancements in technology have led to flexible sigmoidoscopy (FS).

    Purpose of the Study:

    • To review the historical development and impact of sigmoidoscopy in CRC screening.
    • To discuss the current role of flexible sigmoidoscopy (FS) as a screening modality.
    • To explore future directions for population-based FS screening.

    Main Methods:

    • Review of historical case-control studies and randomized clinical trials.
    • Analysis of technological advancements in endoscopic procedures.

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  • Examination of screening program adoption and effectiveness.

    • Main Results:

    • Case-control studies showed 59-79% reduction in CRC mortality with sigmoidoscopy.
    • Flexible sigmoidoscopy (FS) is the only endoscopic screening proven to reduce mortality in randomized trials.
    • Despite proven efficacy, the role of FS in current screening guidelines has diminished.

    Conclusions:

    • Flexible sigmoidoscopy (FS) is a proven method for reducing colorectal cancer (CRC) mortality.
    • The historical success of sigmoidoscopy underscores the value of endoscopic screening.
    • Further exploration of population-based FS screening strategies is warranted.