RT Journal Article SR Electronic T1 Acute psychosis in children: do not miss immune-mediated causes JF Neurosciences Journal JO Neurosciences (Riyadh) FD Prince Sultan Military Medical City SP 252 OP 255 DO 10.17712/nsj.2016.3.20150760 VO 21 IS 3 A1 AlHakeem, Afnan S. A1 Mekki, Mohamed S. A1 AlShahwan, Saad M. A1 Tabarki, Brahim M. YR 2016 UL http://nsj.org.sa/content/21/3/252.abstract AB New-onset psychosis in children represents a complex presenting symptom. Psychosis can be attributable to a combination of factors and etiologies, and all possible causes must be systematically examined. There is growing evidence that a proportion of psychosis/psychiatric manifestations in children may be immune-mediated, and physicians should consider this etiology in each presentation of first-episode psychosis. Immune-mediated encephalopathies/encephalitis are increasingly being recognized in children with antibodies to N-methyl-D-aspartate receptor, Leucine-rich glioma-inactivated 1 or other central nervous system antigens such as Contactin-associated protein-like 2, glutamic acid decarboxylase, alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid or Gamma-aminobutyric acid B. In this study, we describe 3 cases of immune-mediated encephalopathy/encephalitis with prominent psychiatric symptoms at presentation, and suggest a practical diagnostic and treatment approach for children with acute psychosis of an immune-mediated cause.