1Kirkilevsky S. I.,
1,2,3Mashukov A. A.,
2,4Tkachenko O. I.,
3Luk`yanchuk O. V.,
4Maximovsky V. E.,
3Bilenko A. A.,
2,3Merlich S. V.,
3Ratsiborsky D. V.,
3Boychenko A. I.
1Ukraine, Kiev, National Institute of Cancer, Research Department of tumors of the chest cavity;
2Ukraine, Odessa, Odessa National Medical University;
3Ukraine, Odessa, KU «Odessa Regional Oncology Center», Department of abdominal oncology;
4Ukraine, Odessa, Odessa National Medical University, Center of Reconstructive and Plastic Surgery
The available classifications of malignant tumors reflect various aspects of their growth and some biological features. The most commonly used in Ukraine is the 6th revision of TNM classification, which differs from the previous classifications of the section «Gastric cancer», mainly staging of category N, reflecting the presence of metastases in regional lymph nodes. Transition to the 7th classification of TNM translates a part of patients from one stage to another, there is a so-called «stage migration» phenomenon. The famous mathematical phenomenon of Will Rogers describes this transition and theoretically substantiates its objectivity. The authors tracked the migration of patients and the change in the stage mainly from the point of view of the effect of this event on the survival of patients with stomach cancer.
Keywords: stomach cancer, TNM classification, stage migration, Will Rogers phenomenon.
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