[TNM classification of brain tumor].

TM staging proposed by UICC was classified mainly by histology and tumor size (extension). Staging trial was done by using the data of astrocytic tumor cases of the supratentorial region collected both during the periods between 1978 to 1987 by the Brain Tumor Registry of Japan (Permission for publication: Sep. 1994). Survival curves classified by T classification in each histology, such as astrocytoma, malignant astrocytoma, glioblastoma, showed a great differences from each other, even at the same T4 group of each histology. In this sense, the cases in stage IV should not be discussed as a whole, but in the way apart according to each histological group.