Statistical analysis of central nervous system tumors in China.

The authors present a statistical survey of the general incidence, age distribution, and preferential sites of 25, 122 tumors of the central nervous system (CNS), from 12 centers in China. Of these tumors, 22,457 were intracranial and the rest intraspinal. Of the 22,457 intracranial neoplasms collected tumors of neuroepithelial tissue comprised 43.