Malignant cerebellar astrocytoma. Report of five cases.

Five cases of malignant cerebellar astrocytoma observed during a seven-year period are reported. The analysis of the cases allows us to conclude that malignant cerebellar astrocytoma represents a true tumoral entity quite distinct from cerebellar glioblastoma as well as from medulloblastoma. A perfect correspondence between the histological malignancy and the duration of survival has been noted in all the cases.