1) A really
screwed up disease that causes
hallucinations and paranoia so intense you kill those around you and
eventually yourself, usually by clawing out your throat.
2) What would happen if dementia and AIDS had a baby
*On the local news* "Sadly, another person
suffering from the highly dangerous Hinamizawa Syndrome
slaughtered their family, and then died moments later in
the street after clawing out their own throat"