by recognized experts in the field. Some of the topics included in Volume I include: -The developmental biology of glial cells and its relation to the study of glioma biology -The pathology of benign cerebral astrocytomas, oligodendrogliomas, benigh ependymomas and ganglion cell tumors -Patterns of tumor growth and problems associated with histological typing of low-grad gliomas -Growth factors and proliferation potential -Malignant progression in gliomas.