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Colorectal Specialization Increases Lymph Node Yield: Evidence from a National Database.

Arjun N Jeganathan¹, Skandan Shanmugan², Joshua I S Bleier²

¹Department of General Surgery, University of Pennsylvania, Philadelphia, PA, USA. arjun.jeganathan@uphs.upenn.edu.

Annals of Surgical Oncology

|February 10, 2016

Summary

This summary is machine-generated.

Colorectal surgeons identify more lymph nodes (LNs) in cancer patients than general surgeons. Board-certified colorectal specialists significantly improve lymph node identification following colorectal cancer surgery.

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Comparison of Predictive Performance of Three Lymph Node Staging Systems in Colorectal Signet Ring Cell Carcinoma Based on Machine Learning Model

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Published on: April 18, 2025

Area of Science:

Oncology
Surgical Pathology
Health Services Research

Background:

Current guidelines recommend evaluating at least 12 lymph nodes (LNs) after colorectal cancer (CRC) surgery.
The impact of surgeon specialization on achieving this guideline is not fully understood.

Purpose of the Study:

To examine the association between colorectal specialization and lymph node identification following surgery for colon and rectal adenocarcinoma.

Main Methods:

Retrospective cohort study using SEER-Medicare data (2001-2009).
Included patients >65 years undergoing surgical resection for CRC, excluding those with neoadjuvant therapy for rectal cancer.
Multivariate analysis assessed the association between surgical specialization and the number of LNs identified.

Main Results:

Colorectal specialists were associated with a 1.32-1.41 times greater odds of adequate lymphadenectomy compared to general surgeons.
Board-certified colorectal surgeons further increased these odds (1.36-1.58).
High-volume CRC surgery centers and NCI-designated Cancer Centers also correlated with increased LN identification.

Conclusions:

Colorectal specialization, especially board-certification, significantly increases lymph node identification after CRC surgery.
This finding supports the importance of specialized surgical expertise in meeting the 12-LN guideline.