How rare is frontotemporal dementia?

Frontotemporal dementia (FTD) is relatively rare compared to other forms of dementia, accounting for about 5-10% of all dementia cases. It typically affects individuals between the ages of 40 and 65, making it one of the earliest-onset dementias. The exact prevalence is difficult to determine, but estimates suggest that it affects approximately 15-22 people per 100,000 in the general population. Its rarity, combined with its varied symptoms, often leads to delays in diagnosis.