じゃくねんにんちしょう 若年認知症 LinksSentence search for 若年認知症Sentence search for じゃくねんにんちしょうKanji details for 若, 年, 認, 知 and 症Edit in JMdict Noun1. early-onset dementia; presenile dementiaMedicine Discussions Log in to talk about this word.