Laparoscopic Dissection of Lymph Node Station 16-Why and How?

Area of Science:

• Surgical Oncology
• Gastrointestinal Cancer Staging
• Lymph Node Dissection

Background:

• Para-aortic lymph node (Station 16) dissection is vital for prognostication in gastrointestinal, colorectal, and hepatobiliary cancers.
• Positive Station 16 nodes significantly impact survival, comparable to Stage IV disease in pancreas adenocarcinoma.
• Station 16 involvement cannot be solely predicted by hepatoduodenal ligament lymph node dissection in gallbladder cancer.

Purpose of the Study:

• To outline a strategic and stepwise approach for safe para-aortic lymph node (Station 16) dissection.
• To emphasize the prognostic significance of Station 16 lymph node status in surgical decision-making.
• To highlight the importance of anatomical landmarks and techniques for minimizing operative risks.

Main Methods:

• Patient positioning in the French position.
• Performing Kocherization and Cattel-Braasch maneuvers for exposure.
• Utilizing the left renal vein (LRV) as a key landmark for defining dissection borders.

Main Results:

• Visualization of Station 16b lymph nodes is achieved through specific surgical maneuvers.
• Dissection of Station 16a2 requires careful attention to avoid injury to the left renal vein and adjacent arteries.
• A strategic approach allows for safe sampling of Station 16 lymph nodes.

Conclusions:

• Station 16 lymph node status provides critical prognostic information for risk stratification.
• A safe and strategic dissection of Station 16 involves wide duodenal mobilization and careful dissection below the LRV.
• Techniques like thermal fusion can minimize complications such as chyle leak during the procedure.