COVID-19 Presenting With Confusion: An Unusual but Suggestive Electroencephalography Pattern of Encephalitis.

SUMMARY: A 78-year-old man was admitted for acute confusion. At initial investigation physical examination, blood and cerebrospinal fluid tests were unremarkable and EEG showed synchronous bifrontal periodic discharges, an evocative pattern of encephalitis. Coronavirus disease 2019 was diagnosed later after fever onset. Isolated mild confusion may thus be an initial clinical picture of Coronavirus disease 2019 infection.