Which age range is commonly affected by frontotemporal dementia?

Which age range is commonly affected by frontotemporal dementia?

• A. 40-64
• B. 20-40
• C. 65-85
• D. 30-50

Answer: (A)

Frontotemporal dementia typically begins in middle age, earlier than most other dementias. The most common onset is in the 40s to 60s, which aligns with the age range of 40–64. In contrast, onset after 65 is more common for Alzheimer disease, while very young presentations (late 20s–40s) do occur but are less typical and often raise consideration of genetic forms or other etiologies. So, the 40–64 window best reflects the usual age when frontotemporal dementia first presents.

Frontotemporal dementia typically begins in middle age, earlier than most other dementias. The most common onset is in the 40s to 60s, which aligns with the age range of 40–64. In contrast, onset after 65 is more common for Alzheimer disease, while very young presentations (late 20s–40s) do occur but are less typical and often raise consideration of genetic forms or other etiologies. So, the 40–64 window best reflects the usual age when frontotemporal dementia first presents.