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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.
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Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Inflammatory Bowel Disease V: Surgical Management01:21

Inflammatory Bowel Disease V: Surgical Management

Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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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...
Inflammatory Bowel Disease II: Ulcerative Colitis01:20

Inflammatory Bowel Disease II: Ulcerative Colitis

Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal BarrierA...
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Inflammatory Bowel Disease IV: Clinical Manifestations

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Related Experiment Video

Updated: Jul 13, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
15:49

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

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Pit patterns in rectal mucosa assessed by magnifying colonoscope are predictive of relapse in patients with quiescent

Y Nishio1, T Ando, O Maeda

  • 1Department of Gastroenterology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan. takafumia-gi@umin.ac.jp.

Gut
|May 10, 2006
PubMed
Summary

Magnifying colonoscopy (MCS) grading of rectal pit patterns can predict ulcerative colitis relapse. Higher MCS grades correlate with increased inflammation and predict a greater risk of future disease exacerbation.

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Last Updated: Jul 13, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
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07:38

Multimodal Quantitative Phase Imaging with Digital Holographic Microscopy Accurately Assesses Intestinal Inflammation and Epithelial Wound Healing

Published on: September 13, 2016

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Inflammatory Bowel Disease Research

Background:

  • Predicting ulcerative colitis (UC) relapse is challenging with standard colonoscopy.
  • High-resolution video-magnifying colonoscopy with chromoscopy allows detailed observation of colorectal mucosal pit patterns.

Purpose of the Study:

  • To assess the link between magnifying colonoscopy (MCS) pit patterns and histological inflammation/mucosal chemokine activity in quiescent UC.
  • To identify prognostic factors for predicting UC exacerbations prospectively.

Main Methods:

  • Magnifying colonoscopy (MCS) performed on 113 UC patients in remission.
  • Rectal mucosal pit patterns classified into four MCS grades.
  • Mucosal interleukin-8 (IL-8) activity and histological activity assessed from biopsy specimens.
  • Patients followed for relapse over 12 months; multivariate survival analysis used.

Main Results:

  • MCS grade positively correlated with histological grade (p=0.001) and IL-8 activity (p<0.001).
  • MCS grade significantly predicted relapse (RR 2.06, p=0.001).
  • Relapse rates increased with MCS grade: 0% (grade 1), 21% (grade 2), 43% (grade 3), 60% (grade 4) over 12 months.

Conclusions:

  • MCS grading correlates with histological inflammation and IL-8 activity in quiescent UC.
  • MCS grading shows potential as a predictor for subsequent ulcerative colitis relapse in patients in remission.