Japanese Encephalitis presenting with cerebral venous sinus thrombosis: a case report

A 17-year-old man from Sarawak presented with acute encephalitis syndrome. Serologic testing revealed raised Japanese Encephalitis (JE) IgM antibody titre in which first serum JE was negative followed by positive second serum JE IgM one week later. Magnetic resonance imaging (MRI) and Magnetic resonance venogram (MRV) showed cerebral venous sinus thrombosis (CVST) which is a rare presentation of JE. Early identification of CVST is important as anticoagulation needs to be started to reduce adverse neurological sequelae and improve prognosis.