The state of oncology care in Russia: children (0–14 years old), morbidity, mortality, year-by-year lethality (populated study at the federal district level). Part I

Relevance. Malignant tumors among the children’s population is a relatively rare phenomenon. In the USSR, the form of state reporting for the analysis of morbidity provided for the collection of data in the first age group totaling from 0 to 29 years. Indeed, in this age group, malignant tumors are rare 10–15 cases per 100,000 children. Then, after the 35-year-old group, the risk of cancer increases by 10 % every year, and a five-year period gives an increase in the incidence rate by 50–70 %. The probability of malignant tumors in younger age groups differs hundreds of times from those who have reached the age of 70. In accordance with World Health Organization – IARC recommendations, the data in IARC monographs are summarized for 5-year-old age groups 0–4, 5–9, 10–14, 15–19, etc. The last open interval is 85+.

Prepared by the staff of the Laboratory of Oncological Statistics and the Children’s Department of the N.N. Petrov National Medical Research Center of Oncology together with Novel LLC, the completed topic of scientific development of the population children’s cancer registry at the federal district level, transmitted and accepted by the Ministry of Health of the Russian Federation, turned out to be unclaimed.

In February 2019, we formed a unified database of the Northwestern Federal District with a volume of more than 1 million 350 thousand observations, which made it possible to carry out a more detailed development of data on rare localizations: cancer of the heart, eye, thymus, including rare tumors that occur among children population (0–14 years old) and adolescents (15–17 years old). The purpose of the study is to study the patterns of dynamics of morbidity, mortality, the reliability of accounting for sick children (0–14 years old) at the population level, to calculate the survival rates of patients with all tumor localizations, taking into account gender, age, stage of the disease, histological forms and other parameters included in the registration form card (in accordance with the international standard of the Eurocare program). Results. From 2000 to 2018, 4970 children (0–14 years old) with malignant tumors were registered in the Northwestern Federal District of the Russian Federation, of which 3011 are subject to the staging of the tumor process. It is important to note that among all children of patients with malignant tumors, the five-year survival rate of stageable and non-stageable patients was close to 80 %. There is a high level of staging of patients of this group. Thus, patients with stage I of the disease had a five-year survival rate (2010–2014) – 96.3 %, with II – 91.0 % and only with stage IV – 50.9 %.

Conclusions. The creation of a children’s population cancer registry at the federal district level could significantly raise the level of primary registration of malignant tumors, eliminate losses and be able to calculate analytical indicators for rare childhood localization of malignant tumors.

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