Psychosis associated to CASPR2 autoantibodies and ovarian teratoma: A case report

• First report of CASPR2 associated psychosis related to an ovarian teratoma. • Prompt reduction of psychotic symptoms after excision of teratoma. • The diagnosis of autoimmune psychosis can be made in the presence of autoantibodies in the serum while CSF is unremarkable. • Patients with depressive and psychotic symptoms non-responding to antidepressant and antipsychotic treatment should be screened for neuronal autoantibodies including...