early-onset dementia; presenile dementia
Medical term for dementia that develops before age 65. 若年性認知症 is also used.
Early-onset dementia is a general term for dementia that develops before age 65.
Synonymous; 若年性認知症 is more common in some contexts. Both refer to dementia with onset before age 65.
Compound of 若年 (young age) + 認知症 (dementia).