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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,...
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.
Here are some common surgical interventions for IBD:
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...

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Related Experiment Video

Updated: Jun 3, 2026

Robot-assisted Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection for Locally Advanced Middle-low Rectal Cancer
12:45

Robot-assisted Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection for Locally Advanced Middle-low Rectal Cancer

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Current trends in staging rectal cancer.

Abdus Samee1, Chelliah Ramachandran Selvasekar

  • 1Department of Surgery, Princess Royal Hospital, Telford, Shropshire, United Kingdom.

World Journal of Gastroenterology
|March 18, 2011
PubMed
Summary

Preoperative imaging in rectal cancer, including MRI and EUS, guides treatment decisions. Advanced techniques like PET/CT show promise for detecting metastasis and recurrence after chemoradiation.

Keywords:
Computerized tomographyEndoanal ultrasoundInvestigationsMagnetic resonance imagingPositron emission tomographyRectal cancerStagingUltrasound

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The Pocket-Creation Procedure of Endoscopic Submucosal Dissection for Large Rectal Laterally Spreading Tumors
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Published on: February 13, 2026

Area of Science:

  • Oncology
  • Radiology
  • Surgical Oncology

Background:

  • Rectal cancer management relies on accurate staging and margin assessment.
  • Circumferential margin (CRM) status dictates neoadjuvant therapy and prognosis.
  • Current imaging modalities face challenges in post-chemoradiation assessment.

Purpose of the Study:

  • To review the role of various imaging techniques in rectal cancer management.
  • To highlight the utility of EUS, MRI, and CT in staging and recurrence detection.
  • To explore the potential of functional imaging in future rectal cancer treatment strategies.

Main Methods:

  • Review of current imaging modalities for rectal cancer.
  • Discussion of Endoluminal Ultrasound (EUS), MRI, and CT for staging.
  • Exploration of Positron Emission Tomography (PET)/CT for functional imaging.

Main Results:

  • EUS is valuable for T-staging early rectal cancer.
  • MRI assesses mesorectal fascia and aids in early local recurrence detection.
  • CT rules out distant metastasis, but differentiating post-treatment changes remains challenging.

Conclusions:

  • Multidisciplinary teams utilize current imaging for patient-centered rectal cancer management.
  • EUS and MRI offer complementary information post-chemoradiation.
  • Functional imaging, like PET/CT, holds future potential for detecting lymph node metastasis and residual/recurrent disease.