[A recently acknowledged state with great variation in severity. NMDAR encephalitis frequently misinterpreted as psychiatric illness].

Since first described less than ten years ago, anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis is now recognized as one of the most common causes of autoimmune encephalitis. The disorder is more common in women (80%), where it is frequently associated with an underlying ovarian teratoma. Most patients with anti-NMDAR encephalitis develop a multi-stage illness that progresses from initially psychiatric symptoms to subsequent mnemonic disturbances, seizures, dyskinesias, catatonia and even coma.