Hashimoto encephalopathy presenting as schizophrenia-like disorder.
OBJECTIVE
Hashimoto encephalopathy (HE) is associated with numerous neuropsychiatric symptoms and responds well to steroid therapy. In the past, only a few cases were reported to present with pure psychiatric syndromes. We describe a case of HE with presenting symptoms like that of schizophrenic patients.


METHODS
We describe a 73-year-old woman with a history of autoimmune thyroiditis. She had psychotic symptoms for 3 years that responded poorly to antipsychotic agents, and she was thus admitted in 2007.


RESULTS
The diagnosis of HE was made, although the patient presented neurologic symptoms and signs including abnormal electroencephalography, recent memory impairment, and executive function declination. The psychotic symptoms subsided completely in a few days after high-dose intravenous steroid therapy.


CONCLUSIONS
The neuropsychiatric manifestation of HE can be similar to typical schizophrenia. Considering the effectiveness of steroid therapy for HE, we suggested HE as an important differential diagnosis for psychotic disorders, particularly for those patients of late onset, with abnormal electroencephalography, history of autoimmune thyroiditis, or poor response to conventional psychiatric treatment, so as to provide prompt and effective treatment for these patients.
Lin
Yi-Ting
YT
Department of Psychiatry, National Taiwan University Hospital and Medical College, Taiwan.
Liao
Shih-Cheng
SC
D000368:Aged; D001927:Brain Diseases / Q000175:diagnosis* / Q000188:drug therapy; D003937:Diagnosis, Differential; D004569:Electroencephalography; D005260:Female; D050031:Hashimoto Disease / Q000175:diagnosis* / Q000188:drug therapy; D006801:Humans; D008775:Methylprednisolone / Q000627:therapeutic use; D012559:Schizophrenia / Q000175:diagnosis*; D016896:Treatment Outcome
D008775:Methylprednisolone