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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:
Cancer Prevention02:59

Cancer Prevention

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.
Some...
Cancer Prevention02:59

Cancer Prevention

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.
Some...
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...
Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Serum Laboratory Studies, Stool Test, Breath Test01:30

Serum Laboratory Studies, Stool Test, Breath Test

Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...

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Related Experiment Video

Updated: May 30, 2026

Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection
07:35

Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection

Published on: June 8, 2020

Colorectal cancer screening: update for 2011.

Linda C Cummings1, Gregory S Cooper

  • 1Department of Medicine, Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, OH, USA.

Seminars in Oncology
|August 4, 2011
PubMed
Summary

Colorectal cancer screening is underused in the US. New imaging and less invasive tests like fecal DNA tests may improve early detection and patient compliance.

Area of Science:

  • Oncology
  • Gastroenterology
  • Medical Imaging

Background:

  • Colorectal cancer is a leading cause of cancer in the US, with screening rates remaining suboptimal.
  • Current screening methods, including colonoscopy, have limitations, particularly for right-sided tumors and inadequate bowel preparation.
  • Advancements in imaging and non-invasive tests are emerging to address these challenges.

Purpose of the Study:

  • To review the current status of colorectal cancer screening.
  • To discuss limitations of colonoscopy and the potential of advanced imaging techniques.
  • To explore emerging non-invasive screening modalities.

Main Methods:

  • Review of current literature on colorectal cancer screening modalities.
  • Discussion of technological advancements in endoscopic imaging (chromoendoscopy, narrow band imaging).

Related Experiment Videos

Last Updated: May 30, 2026

Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection
07:35

Evaluation of Colorectal Cancer Risk and Prevalence by Stool DNA Integrity Detection

Published on: June 8, 2020

  • Overview of emerging non-invasive screening options (CT colonography, capsule endoscopy, fecal immunochemical tests, fecal DNA tests).

    • Main Results:

    • Colonoscopy, while effective, shows reduced protection for right-sided tumors and is sensitive to bowel preparation quality.
    • Advanced endoscopic imaging techniques can improve lesion detection during colonoscopy.
    • Newer, less invasive screening options show promise for increasing patient adherence.

    Conclusions:

    • Despite declining rates, colorectal cancer screening remains crucial and underutilized.
    • Innovations in imaging and non-invasive tests offer potential to enhance screening efficacy and patient acceptance.
    • Further research and implementation of these advancements are needed to improve colorectal cancer outcomes.