Encephalitis lethargica is an acute encephalopathic illness characterised by sleep disturbance, neuropsychiatric and extrapyramidal symptoms. It is rarely reported in children and the diagnosis is made by exclusion of infective, biochemical, degenerative, autoimmune, toxic or metabolic causes of acute encephalopathy. It is recently postulated to be part of a spectrum of poststreptococcal autoim...
