Creutzfeldt–Jakob disease
Creutzfeldt–Jakob disease (CJD) is an incurable, always fatal, neurodegenerative disease belonging to the transmissible spongiform encephalopathy (TSE) group, also known as prion diseases. Early symptoms include memory problems, behavioral changes, poor coordination, visual disturbances and auditory disturbances.
Source: Wikipedia — Creutzfeldt–Jakob disease (CC BY-SA 4.0)