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Neoadjuvant (chemo)radiotherapy and Lateral Node Dissection: Is It Mutually Exclusive?

Atsushi Ogura¹, Stefan van Oostendorp², Miranda Kusters²

¹Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Clinics in Colon and Rectal Surgery

|November 9, 2020

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Lateral lymph node dissection (LLND) may reduce rectal cancer recurrence. Combining LLND with neoadjuvant chemoradiotherapy (CRT) and total mesorectal excision (TME) could improve outcomes for patients with lateral nodal disease.

Area of Science:

Surgical Oncology
Gastrointestinal Oncology
Rectal Cancer Treatment

Background:

Total mesorectal excision (TME) is standard for rectal cancer.
Lateral lymph node (LLN) management lacks a universal strategy.
Eastern and Western approaches to LLN treatment differ significantly.

Purpose of the Study:

To evaluate the role of lateral lymph node dissection (LLND) in rectal cancer.
To compare different treatment strategies for lateral lymph node metastasis (LLNM).
To determine optimal management for the lateral compartment in rectal cancer.

Main Methods:

Review of current treatment strategies for LLN in rectal cancer.
Analysis of evidence regarding neoadjuvant (chemo)radiotherapy (CRT) and LLND.

Keywords:

chemoradiotherapy lateral lymph node lateral lymph node dissection radiotherapy rectal cancer

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Comparison of outcomes between Eastern (LLND without CRT) and Western (CRT without LLND) approaches.

Main Results:

Lateral nodes are a major cause of local recurrence after CRT plus TME.
LLND has been shown to reduce local recurrence, especially in the lateral compartment.
Current evidence suggests LLNM is a significant factor in treatment failure.

Conclusions:

LLND is crucial for managing lateral nodal disease in rectal cancer.
A combination of neoadjuvant (chemo)radiotherapy (CRT) plus LLND may offer improved outcomes.
Further research is needed to establish the optimal combined strategy for rectal cancer with lateral nodal involvement.