Lymph node threshold in colorectal cancer: surgeons' perspectives and practices.

Area of Science:

• Oncology
• Surgical Pathology

Background:

• Current guidelines recommend examining at least 12 lymph nodes (LN) in colorectal cancer resections.
• Suboptimal lymph node yield is a concern in surgical pathology.

Purpose of the Study:

• To survey surgeon perspectives on suboptimal lymph node yield (<12).
• To assess interpretive variability and beliefs regarding the clinical impact of low lymph node yield.

Main Methods:

• A voluntary 19-question electronic survey was distributed to colorectal and general surgeons.
• The survey explored clinical, pathological, and molecular considerations in cases with low lymph node yield.

Main Results:

• 71% of 168 respondents reported infrequent suboptimal lymph node yields, while 29% encountered them regularly.
• Opinions diverged on managing low lymph node yield, especially when N-stage was achieved or considering fat submission.
• 49% believed low lymph node yield rarely alters treatment, though many acknowledged its association with poorer outcomes. Neoadjuvant therapy and specimen characteristics were cited as contributing factors.

Conclusions:

• Surgeon perspectives on the significance and causes of suboptimal lymph node yield vary, despite the '12-node rule'.
• Effective communication between surgeons and pathologists is crucial for understanding factors influencing lymph node yield and optimizing patient care.