[Autoimmune encephalitis in psychiatric institution (clinical case)].

Currently there is a new concept of «molecular neuropsychiatry» which aim is identification of biomarkers and biological substrates for mental disorders. Autoimmune encephalitis can start with psychiatric symptoms in 60% of cases. In this article we described a clinical case of a patient, 31 years old, with GABAb-associated AE started with acute polymorphic psychosis. AE was diagnosed and treated in time with a good clinical effect. According to the frequency of psychiatric symptoms in AE patients it should be reasonable to include antineuronal test in CSF and serum in patients with first acute psychosis if «red flags» or atypical course of the disease.