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A Case of Late-Onset Bipolar Disorder With Severely Abnormal Behavior and Neuroimaging Observations Very Similar to Those of Frontotemporal Dementia
Akira Monji, M.D.; Keisuke Motomura, M.D.; Yoshito Mizoguchi, M.D.; Tomoyuki Ohara, M.D.; Shingo Baba, M.D.; Takashi Yoshiura, M.D.; Shigenobu Kanba, M.D.
The Journal of Neuropsychiatry and Clinical Neurosciences 2014;26:E35. doi:10.1176/appi.neuropsych.13020031
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Dept. of Psychiatry, Faculty of Medicine, Saga University, Nabeshima 5-1-1, Saga-City, Japan
Dept. of Neuropsychiatry, Graduate of School of Medical Sciences, Maidashi 3-1-1, Higashi-ku, Fukuoka-City, Japan
Dept. of Clinical Radiology, Graduate of School of Medical Sciences, Maidashi 3-1-1, Higashi-ku, Fukuoka-City, Japan

Correspondence: Dr. Monji; e-mail:amonji@hf.rim.or.jp

Copyright © 2014 American Psychiatric Association


To the Editor: Frontotemporal dementia (FTD) is mainly characterized by neuropsychiatric symptoms, usually preceding cognitive impairment, and an early impairment of executive functions, with relatively preserved memory and visuospatial skills.1 There have thus been some case reports of FTD that is initially diagnosed as schizophrenia or bipolar disorders (BP).2 We herein report a case of late-onset BP that was initially diagnosed as major depressive disorder and was temporarily diagnosed as FTD because of severely abnormal behaviors and neuroimaging observations that were very similar to those of FTD.

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