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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,...
Diverticular Disease of the Colon01:27

Diverticular Disease of the Colon

Diverticular disease involves the formation of diverticula—small sac-like outpouchings of the colonic wall—and their complications. It most commonly affects the sigmoid colon due to higher intraluminal pressure and structural vulnerability. It results from structural weakness and increased pressure in the colon, producing pseudodiverticula that may remain silent or progress to inflammation and serious complications.Structure of DiverticulaIn diverticulosis, these outpouchings are...
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:
Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
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
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...
Inflammatory Bowel Disease I: Introduction01:26

Inflammatory Bowel Disease I: Introduction

Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows “skip lesions” in which...

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Related Experiment Video

Updated: Jul 10, 2026

A Genetically Engineered Mouse Model of Sporadic Colorectal Cancer
06:01

A Genetically Engineered Mouse Model of Sporadic Colorectal Cancer

Published on: July 6, 2017

[Colorectal polyps].

Bjørn Hofstad1, Solveig Norheim Andersen, Arild Nesbakken

  • 1Gastromedisinsk avdeling, Ullevål universitetssykehus, 0407 Oslo. bjho@uus.no

Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
|October 24, 2007
PubMed
Summary
This summary is machine-generated.

Colorectal polyps are common, with Norway having high incidence rates. Early detection and removal of polyps are crucial for preventing colorectal cancer, with various endoscopic and surgical techniques available.

Related Experiment Videos

Last Updated: Jul 10, 2026

A Genetically Engineered Mouse Model of Sporadic Colorectal Cancer
06:01

A Genetically Engineered Mouse Model of Sporadic Colorectal Cancer

Published on: July 6, 2017

Area of Science:

  • Gastroenterology
  • Oncology
  • Medical Diagnostics

Context:

  • Colorectal polyps exhibit significant geographical incidence variations, notably high in Norway.
  • Most colorectal cancers are believed to develop from polyps, underscoring the importance of polyp management.
  • Current strategies for polyp detection, eradication, and follow-up require regular updates.

Purpose:

  • To provide an updated overview of colorectal polyp detection, classification, and management strategies.
  • To discuss the role of colonoscopy, CT colonography, and other diagnostic tools.
  • To outline current treatment modalities for various polyp types, including endoscopic and surgical options.

Summary:

  • Polyp classification relies on morphology and histology, influencing malignancy risk.
  • Colonoscopy is the primary diagnostic and therapeutic tool for polyps, enabling biopsy and immediate treatment.
  • Various techniques, from endoscopic snare resection to transanal endoscopic microsurgery and surgical resection, are employed for polyp removal based on size, location, and malignancy risk.

Impact:

  • Improved understanding of polyp management can lead to earlier cancer detection and better patient outcomes.
  • The integration of advanced endoscopic techniques and imaging modalities like CT colonography enhances diagnostic accuracy and treatment efficacy.
  • Standardized and updated guidelines for polyp surveillance are essential for reducing colorectal cancer incidence and mortality.