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Tumors of Central Nervous System (CNS) are most seen solid tumor in childhood. Accounting approximate 25–30% of pediatric neoplasms, treatments on these tumors are complicated as they occur in different age ranges, have various types according to classification system and contain different characteristic molecular profiles. There are huge gaps of medical services for children with CNS tumors in different regions in China, which is blamed to limited medical resources and lack of epidemiology data for Chinese population. After the establishment of CNOG (Children’s Neuro-Oncology Group) in China in 2017, national wide registry (CNOG-MC001) was conducted to collect data on the basic information about pediatric tumors of CNS. Results of 4059 cases from 37 centers providing medical services for pediatric CNS tumors in 25 provinces from 6 greater administrative areas in China showed distinct tumor ratio, compared to worldwide data by WHO classification. The mean of age was 8.01 ± 4.73, with a male vs. female ratio as 1.48 to 1. Embryonal tumor, astrocytic &amp; oligodendroglial tumors, and other astrocytic tumors were three most common tumor types in CNS of children. The lost follow-up rate was surprisingly high as 53.07%. In all, this is the first national wide registry for pediatric CNS tumor in China and the results attracted public and government’s attentions for further epidemic investigations.

LINC-19. CURRENT SITUATION OF PEDIATRIC TUMORS OF CENTRAL NERVOUS SYSTEM IN CHINA - THE FIRST CNOG NATIONAL WIDE REPORT