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Related Concept Videos

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...
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 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:

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Related Experiment Video

Updated: Jul 19, 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: potential pitfalls.

J Duggan1

  • 1Centre for Clinical Epidemiology and Biostatistics, Faculty of Health Science, University of Newcastle.

Australian Health Review : a Publication of the Australian Hospital Association
|May 19, 2001
PubMed
Summary

National guidelines support colorectal cancer screening, but cost-effectiveness evidence is inconclusive. Appropriately funded trials are recommended to avoid unjustified spending on this important cancer screening initiative.

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Area of Science:

  • Public Health
  • Health Economics
  • Oncology

Background:

  • National guidelines now support colorectal cancer screening.
  • Significant funding is being allocated to colorectal cancer screening programs.
  • Existing evidence on the cost-effectiveness of screening is inconclusive.

Purpose of the Study:

  • To evaluate the need for further research into the cost-effectiveness of colorectal cancer screening.
  • To address the inconclusive evidence regarding the economic viability of national screening programs.

Main Methods:

  • Review of existing cost-effectiveness data for colorectal cancer screening.
  • Analysis of the implications of inconclusive evidence for policy and funding.

Main Results:

  • The Cochrane Centre highlights inconclusive evidence regarding cost-effectiveness.
  • A risk of unjustified expenditure exists without further clarification.

Conclusions:

  • Undertaking appropriately funded trials is crucial for colorectal cancer screening.
  • Further research is needed to justify current and future investments in screening.