Study of the evolution of central nervous system tumors in children in metropolitan France and the influence of changes in diagnostic methods and classification.

The objective is to study the evolution of the incidence of central nervous system tumors in children under 15 years old in metropolitan France, overall and for the most frequent types (gliomas, embryonal tumors), and by localization.

Patients concerned: All children under 15 years old residing in France who have been diagnosed with malignant or benign Central Nervous System tumors between the years 2000 and 2020.

Data used: Data collected by the RNCE: gender, date of birth, date of cancer diagnosis, diagnostic imaging exams, histological confirmation and review, immuno-histochemistry and/or molecular biology data, tumor grade and size, certain predisposition syndromes (neurofibromatosis).