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Related Concept Videos

Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

471
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,...
471
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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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...
162

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Related Experiment Video

Updated: Oct 1, 2025

Robot-assisted Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection for Locally Advanced Middle-low Rectal Cancer
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[Initial staging of rectal cancer].

Ingrid Faouzi1, Olivier Lucidarme2

  • 1Service d'imageries spécialisées et des urgences, hôpital La Pitié-Salpêtrière, AP-HP, Paris, France.

La Revue Du Praticien
|March 8, 2022
PubMed
Summary

Initial staging of rectal cancer involves clinical exams, colonoscopy, and advanced imaging. Rectal MRI assesses local spread, while CT scans detect distant metastasis, guiding treatment decisions.

Keywords:
Rectal Neoplasms

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Area of Science:

  • Oncology
  • Medical Imaging

Background:

  • Rectal cancer is a common digestive malignancy.
  • Diagnosis often occurs via screening or symptoms, confirmed by colonoscopy and biopsies.

Purpose of the Study:

  • To outline the essential imaging modalities for initial rectal cancer staging.
  • To detail the roles of MRI and CT in assessing cancer extent.

Main Methods:

  • Standardized rectal magnetic resonance imaging (MRI) protocols are used for loco-regional assessment.
  • Thoracic-abdominal-pelvic computed tomography (CT) scans are employed to detect metastatic spread.
  • Clinical examination and colonoscopy with biopsies are initial diagnostic steps.

Main Results:

  • Rectal MRI provides crucial data on tumor localization, prognostic factors, and lymph node involvement.
  • CT scans primarily identify liver and lung metastases.
  • Specialized imaging like endoscopic ultrasound and PET scans are reserved for specific clinical scenarios.

Conclusions:

  • Accurate initial staging of rectal cancer relies on a combination of clinical evaluation and specific imaging techniques.
  • MRI and CT are the primary tools for evaluating local and distant disease spread, respectively.
  • Standardized reporting of imaging findings is vital for effective treatment planning.