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Related Experiment Video

Updated: May 14, 2025

Single Incision Plus One Port Laparoscopic Proximal Gastrectomy with Double Channel Anastomosis for Gastric Cancer Treatment
03:32

Single Incision Plus One Port Laparoscopic Proximal Gastrectomy with Double Channel Anastomosis for Gastric Cancer Treatment

Published on: December 27, 2024

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Defining Optimal Lymph Node Yield in Gastrectomy: A Real-World Cohort Analysis.

Rui Li1,2,3, Xu Sun1,2,3, Zhiyuan Yu1,2,3

  • 1School of Medicine, Nankai University, Tianjin, China.

World Journal of Surgical Oncology
|April 11, 2025
PubMed
Summary

Determining the optimal number of lymph nodes (LNs) examined in gastric cancer (GC) surgery is crucial. This study provides a quantitative framework to link LN harvest numbers with metastasis risk, aiding treatment decisions for GC patients.

Keywords:
False-negativeGastric cancerLymph nodeNodal staging systemΒ-binomial distribution

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Area of Science:

  • Oncology
  • Surgical Pathology
  • Biostatistics

Background:

  • Gastric cancer (GC) presents significant global mortality and incidence.
  • Accurate lymph node (LN) staging is critical for GC treatment decisions, but optimal LN examination numbers are unclear.

Purpose of the Study:

  • To establish a quantitative framework for determining lymph node (LN) harvest thresholds in gastric cancer (GC).
  • To link LN examination numbers to false-negative metastasis risk using real-world data.

Main Methods:

  • Retrospective analysis of 6463 gastric cancer (GC) patients undergoing gastrectomy.
  • Application of a statistical model based on beta-binomial distribution and maximum likelihood estimation to calculate false-negative probabilities.

Main Results:

  • For cT1 GC, examining 5 LNs had <5% risk of missing positive nodes.
  • 17 LNs were needed for cT2 GC, while 35 LNs still had >20% risk for cT3/cT4 GC.
  • 25 LNs were recommended for proximal/distal gastrectomy, and 59 LNs for entire gastrectomy to achieve 90% confidence in ruling out nodal disease.

Conclusions:

  • A novel quantitative framework was developed to connect lymph node (LN) harvest numbers with false-negative metastasis risk in gastric cancer (GC).
  • This framework, based on real-world data, aids in optimizing LN examination strategies for improved GC staging and treatment.