My father-in-law has this. Was diagnosed a couple years ago. I think it's also somehow related to early onset dementia? That may just be in the FIL's case though, so don't quote me.
It's been hard to watch it take its toll on the guy. His speech has definitely been affected. He has a hard time "spitting it out," in so many words (no pun intended lol). It's only downhill from here, apparently. Sucks.
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