Creation of a Normal Database for FluoroDeoxyGlucose-Positron Emission Tomography (FDG-PET) Neurological Examinations

Inclusion Criteria: * Patient with tumor in remission or low disabling chronic tumor * No parenteral chemotherapy for at least 1 month * No glucocorticoid treatment * No general health modification (asthenia, anorexia, weight reduction) Exclusion Criteria: * Patient having a known neurodegenerative disorder, a general disease or physical problems that can interfere with cognitive function * Patient with cerebral pathology history (epilepsy, vascular event, cerebral vascular malformation, tumor, severe cranial trauma, meningitis or infectious or inflammatory encephalitis, hydrocephalus, mental retardation…) * Patient not having at least 4 years of education * Patient having an anxiolytic or anti-depressive treatment * Patient refusing to participate to the study * Patient incapable to give informed consent (guardianship)