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Malignant neoplasms of the tongue occupy 0.55% in the general structure of the cancer incidence in the Russian population. No information on other parameters (the number of deaths, mortality of patients, their distribution by stages of the disease and other analytical indicators) is provided in the official reporting.&#x0D;The opportunity appeared only with the development of Population-based Cancer Registries (PCR) system, but this wealth of material is not used for the official reporting.&#x0D;Tongue cancer is a visual localization with a high mortality rate, which requires special attention.&#x0D;The research was conducted in order to investigate the state of the Russian Oncology Service for tongue cancer patients with the calculations of one-year mortality rate, annual mortality rate, median survival, 1,3,5-year observed and relative survival rates. The research was undertaken at the level of the newly created Population-based Cancer Registry of the Federal District for the first time in Russia.&#x0D;The studies on the analysis of cancer survival rate at the population level are practically not carried out in Russia. Such investigations for all malignant tumor localizations have been conducted since 2000 on the basis of Saint Petersburg PCR database. The level of 5-year observed and relative survival rates of tongue cancer patients in Russia (Saint Petersburg and the NWFD RF) has been determined significantly lower than the EU average (Eurocare-4). To carry out this study, 5188 observations from the NWFD RF PCR database were selected. It has been established that during four periods of observation, the one-year mortality rate of tongue cancer patients in the NWFD RF has decreased under the C01 heading (malignant neoplasm of base of tongue) from 58.5 to 45.8%; and under the C02 heading (malignant neoplasm of other and unspecified parts of tongue)  from 54.5 to 42.7%. The five-year survival rate of tongue cancer patients has increased by 23.3%.

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State of the Russian Oncology Service: malignant neoplasms of the tongue C01, 02 (mortality rate and median survival of patients, taking into account the stage of the disease and histological structure of the tumor) Part 2