Lateral Lymph Node Dissection With the Focus on Indications, Functional Outcomes, and Minimally Invasive Surgery

Area of Science:

• Surgical Oncology
• Gastrointestinal Oncology
• Rectal Cancer Treatment

Background:

• Lateral lymph node dissection (LLND) is debated for mid to low advanced rectal cancer.
• Japanese guidelines recommend LLND for T3/4 rectal cancer below the peritoneal reflection.
• Western guidelines often reserve LLND for suspicious nodes, despite 8-12% lateral pelvic recurrence post-chemoradiotherapy (CRT).

Purpose of the Study:

• To evaluate the role and patient selection criteria for lateral lymph node dissection (LLND) in advanced rectal cancer.
• To assess the impact of LLND on lateral pelvic recurrence rates.
• To review the safety and feasibility of laparoscopic LLND.

Main Methods:

• Literature review of studies on lateral lymph node dissection (LLND) in rectal cancer.
• Analysis of recurrence rates after preoperative chemoradiotherapy (CRT) with and without LLND.
• Evaluation of outcomes for laparoscopic versus open LLND procedures.

Main Results:

• Lateral pelvic recurrence rates range from 8% to 12% even after preoperative CRT.
• Patient selection for LLND should prioritize lateral lymph node size and response to CRT.
• Laparoscopic LLND appears safe, oncologically feasible, and offers potential short-term benefits.

Conclusions:

• LLND is a critical consideration for specific advanced rectal cancer patients.
• Node size and CRT responsiveness are key factors for selecting patients for LLND.
• Laparoscopic LLND presents a viable, potentially advantageous surgical approach.