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Related Concept Videos

Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

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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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Related Experiment Video

Updated: May 6, 2026

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Technical tips for intersphincteric resection: how to take out the rectum.

Yoshito Akagi1, Tetsushi Kinugasa, Yousuke Oka

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This study introduces a novel intersphincteric resection (ISR) technique for rectal cancer. Drawing the rectum through the anus allows safe anterior dissection, preserving the anus and avoiding complications.

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Area of Science:

  • Colorectal Surgery
  • Surgical Oncology
  • Anorectal Anatomy

Background:

  • Intersphincteric resection (ISR) is a sphincter-preserving technique for rectal cancer.
  • Dissecting the anterior rectal wall during ISR is challenging and risks injury to adjacent organs.

Purpose of the Study:

  • To describe a novel and safe ISR technique for improved anterior rectal wall dissection.
  • To evaluate the safety and efficacy of drawing the rectum through the anus for ISR.

Main Methods:

  • Transabdominal dissection of the intersphincteric space (ISS).
  • Transanal dissection into the ISS from the posterior side, drawing the rectum through the anus.
  • Direct visualization for anterior rectal wall dissection (prostate/vagina).

Main Results:

  • The described ISR technique facilitates safe and easy dissection of the anterior rectal wall under direct vision.
  • This method avoids positive surgical margins and unexpected bleeding.
  • Injury to adjacent organs (prostate/vagina) is prevented.

Conclusions:

  • This modified ISR technique, involving drawing the rectum through the anus, is safe and effective.
  • It simplifies anterior rectal wall dissection, crucial for sphincter preservation in rectal cancer surgery.