Even subtle abnormalities in CSF (mild pleocytosis,slightly increased protein concentration) and inspecific EEGabnormalities should be interpreted as "red flags" indicating an organiccause in patients with psychiatric symptoms.4 Therefore, the importance of familiaritywith this syndrome among psychiatrists should be emphasized, becauserecognition of the combinations of these symptoms should raisesuspicions of anti-NMDAR encephalitis and prompt testing for antibodiesagainst the GluN1 subunit of the NMDAR. This evidence concerns the gene GRIN1 and viral encephalitis.