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Related Experiment Video

Updated: Dec 6, 2025

Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy
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Delayed Cerebral Abnormalities in Acute Hyperammonemic Encephalopathy.

Hiroshi Ito1, Yasuhiro Ogawa1, Nobutake Shimojo1

  • 1Division of Hospital Medicine, University of Tsukuba Hospital, Tsukuba, JPN.

Cureus
|October 14, 2020
PubMed
Summary

Acute hyperammonemic encephalopathy (AHE), a rare condition, can cause delayed brain abnormalities. Follow-up imaging is crucial for detecting these changes and understanding their link to patient outcomes.

Keywords:
acute hyperammonemic encephalopathycirrhosis

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Area of Science:

  • Neurology
  • Radiology
  • Hepatology

Background:

  • Acute hyperammonemic encephalopathy (AHE) is a rare, life-threatening neurological complication.
  • Cirrhosis is a common underlying condition associated with AHE.
  • Early diagnosis and management are critical for patient outcomes.

Observation:

  • An 81-year-old woman with cirrhotic AHE presented with prolonged disorientation.
  • Initial magnetic resonance (MR) imaging on day 3 was normal.
  • Delayed MR imaging on day 13 revealed bilateral abnormalities in the insular and cingulate cortices.

Findings:

  • Cerebral abnormalities on MR imaging appeared by day 13, persisting with slight improvement by day 24.
  • These delayed imaging findings correlated with the patient's persistent disorientation.
  • This case highlights that AHE can manifest with delayed cerebral abnormalities.

Implications:

  • Follow-up neuroimaging is valuable for detecting delayed cerebral abnormalities in AHE.
  • Understanding the correlation between imaging findings and clinical outcomes is essential.
  • Further research is needed to elucidate the relationship between imaging changes and patient prognosis in AHE.