Résumé
Although the neuropathologic changes and diagnostic criteria for the neurodegenerative disorder Alzheimer′s diseasehave been established, the clinical symptoms are very different largely.The clinical symptoms of its special type frontal lobe variant and behavioral variant frontotemporal dementia are very similar, which brings great challenges to the differential diagnosis.Therefore, we report a patient with progressive cognitive impairment, early significant executive dysfunction and abnormal behavior, and magnetic resonance imaging showed significant frontotemporal atrophy.It is easy to be misdiagnosed as behavioral variant frontotemporal dementia.However, multimodal functional neuroimaging results show that neuropathological changes are more likely to be frontal variant Alzheimer′s disease.This study shows that the use of detailed neuropsychological tests, biological markers and multimodal neuroimaging to identify these atypical syndromes will help to improve the accuracy of diagnosis and patient management.
Résumé
In pre-surgical evaluation of pediatric epilepsy, the combined use of multiple imaging modalities for precise localization of the epileptogenic focus is a worthwhile endeavor. Advanced neuroimaging by high field Magnetic resonance imaging (MRI), diffusion tensor images, and MR spectroscopy have the potential to identify subtle lesions. 18F-FDG positron emission tomography and single photon emission tomography provide visualization of metabolic alterations of the brain in the ictal and interictal states. These techniques may have localizing value for patients which exhibit normal MRI scans. Functional MRI is helpful for non-invasively identifying areas of eloquent cortex. These advances are improving our ability to noninvasively detect epileptogenic foci which have gone undetected in the past and whose accurate localization is crucial for a favorable outcome following surgical resection.