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Unusual presentation of more common disease/injury
Memory deficits due to brain injury: unique PET findings and dream alterations
  1. Masaki Nishida1,
  2. Tadashi Nariai2,
  3. Mikio Hiura3,
  4. Kenji Ishii4,
  5. Toru Nishikawa1
  1. 1Section of Psychiatry and Behavioral Science, Tokyo Medical and Dental University Graduate School, Bunkyo, Japan
  2. 2Department of Neurosurgery, Tokyo Medical and Dental University Hospital, Bunkyo, Japan
  3. 3Department of Sports Health Science, Hosei University, Machida, Japan
  4. 4Positron Medical Center, Tokyo Metropolitan Institute of Gerontology, Itabashi, Japan
  1. Correspondence to Dr Masaki Nishida, masaki.nishida{at}gmail.com

Summary

The authors herein report the case of a young male with memory deficits due to a traumatic head injury, who presented with sleep-related symptoms such as hypersomnia and dream alterations. Although MRI and polysomnography showed no abnormalities, 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) and 11C flumazenil (FMZ)-PET revealed findings consistent with cerebral damage to the affected temporal region. The memory deficit of the patient gradually improved in parallel with the relief of the sleep-related symptoms. FDG-PET showed considerable improvement in glucose metabolism when he had recovered, however, evidence of neural loss remained in the FMZ-PET findings.

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Footnotes

  • Competing interests None.

  • Patient consent Obtained.