Statistical Analysis for Prognosis of CNS Tumor According to the New WHO Classification

ABSTRACT

The authors have reviewed and followed up 664 operated patients at the Department of Neurosurgery, Chonnam University Hospital from January 1984 to December 1993 according to the new WHO classification of CNS neoplasms. The sex ratio(M:F) was 1:1.1 and the age distribution showed a peak between 51 to 60 years. Common tumors were glioma(28%), meningioma(21%), pituitary adenoma(15%), schwannoma(9%), metastatic tumor(8%) in the decreasing order of frequency. The most common tumor was glioblastoma(33%) within the category of gliomas. Incidence of pediatric brain tumors was about 12% among the all intracranial tumors. Survival curves for astrocytomas, pilocytic astrocytomas, anaplastic astrocytomas, glioblastoma and metastatic tumors were obtained from follow-up studies of the brain tumor patients regardless of therapeutic mode.