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Collection and Processing of Lymph Nodes from Large Animals for RNA Analysis: Preparing for Lymph Node Transcriptomic Studies of Large Animal Species
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Essential anatomy for lateral lymph node dissection.

Yuichiro Yokoyama1, Hiroaki Nozawa1, Kazuhito Sasaki1

  • 1Department of Surgical Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.

Annals of Coloproctology
|December 8, 2023
PubMed
Summary

Lateral lymph node dissection (LLND) is crucial for advanced rectal cancer when lymph nodes are enlarged before chemoradiotherapy (CRT). Understanding pelvic anatomy is essential for safe and effective LLND, despite its challenges.

Keywords:
Colorectal surgeryLaparoscoyLateral lymph node dissectionRobot

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Area of Science:

  • Surgical Oncology
  • Anatomy
  • Gastroenterology

Background:

  • Standard rectal cancer treatment involves preoperative chemoradiotherapy (CRT) and total mesorectal excision (TME) but may be insufficient for lateral lymph node recurrence.
  • Enlarged lateral lymph nodes prior to CRT necessitate lateral lymph node dissection (LLND) for improved recurrence control.

Purpose of the Study:

  • To clarify the essential pelvic anatomy required for performing lateral lymph node dissection (LLND).
  • To provide a comprehensive anatomical understanding for safe and accurate LLND, particularly in the context of rectal cancer surgery.

Main Methods:

  • Literature review focusing on pelvic anatomy relevant to rectal surgery and LLND.
  • Integration of anatomical knowledge with surgical experience and insights from 3D models and operative views.

Main Results:

  • LLND, while effective, presents challenges including longer operative times, increased hemorrhage, and higher complication rates compared to TME alone.
  • Safe and functional LLND is achievable, with laparoscopic and robotic approaches widely adopted.
  • Accurate identification of anatomical landmarks is critical to prevent misrecognition of vessels and nerves during LLND.

Conclusions:

  • A thorough understanding of anatomical landmarks is paramount for the safe and accurate performance of lateral lymph node dissection (LLND).
  • Despite advancements, LLND remains a complex procedure requiring specialized anatomical knowledge for optimal outcomes in rectal cancer treatment.