[Genetic diseases and glioblastomas].

Some cancers are involved in inherited genetic syndromes. These genetic diseases are suspected of being involved in approximately 1% of gliomas. Few data are available on glioblastomas and their characteristics among these diseases. Familial syndromes known to predispose individuals to glioblastoma are neurofibromatosis type 1, Li-Fraumeni's syndrome, tuberous sclerosis, and Turcot's syndrome. This review discusses glioblastomas related to these diseases and the current knowledge on the statistical, clinical, and molecular biology data. Non-syndromic glioma families are discussed: a better understanding of molecular abnormalities in these groups should help understand the mechanisms of gliomagenesis. A case of malignant glioma requires the physician to actively search for the possibility of inherited factors and eventually suggest genetic counseling.