We believe my father who passed at 65 years old had early onset dementia starting around the age of 45 -50 years old we got the news officially September 2020 he was already bad enough didn’t really know what was going on. We discovered he had not one, not but 3 types of dementia. Which is why he was so lost. He handled it well because he didn’t understand that was hard. I wish he could have shared his feelings but by that time he never really talked. When he did it was very hard to understand and was more like babbling similar not baby’s for lack of a better description