Meningoencephalitis (; from Greek μῆνιγξ "meninx", "membrane", ἐγκέφαλος, "enképhalos" "brain", and the medical suffix "-itis", "inflammation"), also known as herpes meningoencephalitis, is a medical condition. It is like meningitis, which is an infection or inflammation of the meninges, and encephalitis, which is an infection or inflammation of the brain.