Is early-onset clinically different from late-onset frontotemporal dementia?

Frontotemporal dementia (FTD) is the second most common neurodegenerative dementia in the young age after Alzheimer disease. Recent improvement in diagnostic assessment suggests that it is more common than previously, although with a great heterogeneity in clinical presentation. The different clinical patterns related to age of disease onset in behavioural variant FTD (bvFTD) have been fairly studied. Aim of the study was to evaluate whether age at disease onset modulate the heterogeneity of either cognitive impairment or behavioural disturbances in patients affected by bvFTD