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Para-aortic Lymph Node Dissection for Colorectal Cancer: Predicting Pathologic Lymph Node Positivity and Optimizing

Neal Bhutiani1, Kentaro Ochiai1, Muhammad O Awiwi2

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|June 5, 2024
PubMed
Summary
This summary is machine-generated.

Para-aortic lymph node (PALN) metastasis in colorectal cancer patients undergoing dissection indicates poorer survival. Factors like metachronous disease and imaging findings predict positive pathology, guiding treatment decisions for better outcomes.

Keywords:
Colon cancerPara-aortic lymph nodesRectal cancer

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Area of Science:

  • Oncology
  • Surgical Oncology
  • Gastrointestinal Oncology

Background:

  • Para-aortic lymph node (PALN) involvement in colorectal cancer signifies advanced disease.
  • Selecting patients for PALN dissection to maximize oncologic benefit is challenging.
  • This study aimed to identify predictors of survival in colorectal cancer patients undergoing PALN dissection.

Purpose of the Study:

  • To identify factors predicting survival in colorectal cancer patients undergoing PALN dissection.
  • To evaluate the impact of pathologically positive PALN on recurrence-free survival (RFS) and overall survival (OS).

Main Methods:

  • Retrospective analysis of 74 colorectal cancer patients who underwent curative-intent PALN dissection (2007-2020).
  • Comparison of patients with and without pathologically positive PALN.
  • Survival analysis to assess the impact of positive PALN on RFS and OS.

Main Results:

  • Of 74 patients, 28 (37.8%) had pathologically positive PALN.
  • Positive PALN pathology was associated with metachronous disease and abnormal imaging findings.
  • Pathologically positive PALN significantly decreased RFS (HR 3.90) and OS (HR 4.49).
  • Well/moderately differentiated histology and metachronous disease were associated with better OS in pathologically positive PALN cases.

Conclusions:

  • Pathologically positive PALN are linked to worse RFS and OS after dissection in colorectal cancer.
  • Clinicopathologic factors can predict PALN positivity.
  • Curative-intent surgery may benefit selected patients, particularly those with well/moderately differentiated tumors and possibly metachronous disease.