Sporadic Creutzfeldt-Jakob disease (sCJD) is a subacute fatal neurodegenerative disease belonging to the group of prion diseases, characterized by a clinical triad of dementia, myoclonus, and EEG anomalies, along with neuropathological evidence of neuronal loss, spongiform changes, and astrocytosis. There are three types of CJD: sporadicCJD (sCJD), inherited CJD (see this term), and iatrogenic and variant CJD (vCJD).