Improved Prognostic Value of the 5th Edition TNM Classification for Gastric Cancer
Author Information
Author(s): Kranenbarg E Klein, Hermans J, van Krieken J H J M, van de Velde C J H
Primary Institution: Leiden University Medical Center
Hypothesis
The 5th edition of the TNM classification for gastric cancer provides better prognostic value compared to the 4th edition.
Conclusion
The 5th edition of the TNM classification offers a better estimation of prognosis for gastric cancer, although the requirement to examine at least 15 negative lymph nodes is too high.
Supporting Evidence
- 39% of node-positive patients had a different N stage according to the 5th edition compared to the 4th edition.
- 5-year survival rates improved for N0, N1, and N2 groups under the 5th edition classification.
- The new TNM stage was shown to be a better prognosticator than the previous version.
Takeaway
This study shows that a new way of classifying gastric cancer helps doctors predict how patients will do better than the old way, but they don't always need to check as many lymph nodes as they thought.
Methodology
Data were retrieved from a randomized trial database comparing D1 and D2 dissection.
Limitations
38% of all node-negative patients could not fulfill the requirement for examining at least 15 nodes.
Participant Demographics
Curatively operated patients with gastric cancer.
Statistical Information
P-Value
P = 0.006
Statistical Significance
p<0.0005
Digital Object Identifier (DOI)
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