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Hypoxic Ischemic Encephalopathy with Atypical Findings on CT and MR Imaging:Two Case Reports Hidetaka Arishima 1 , Tetsuya Hosoda 1 , Norichika Hashimoto 1 , Yuji Handa 1 , Toshihiko Kubota 1 , Ryuuji Suzuki 2 , Hironobu Tokunaga 2 , Hiroshi Morita 2 , Tetsuya Kimura 2 , Hidekazu Terasawa 2 1Department of Neurosurgery,University of Fukui 2Department of Acute Medicine,University of Fukui Keyword: hypoxic ischemic encephalopathy , computed tomography (CT) , magnetic resonance (MR) imaging , cardiopulmonary resuscitation pp.874-879
Published Date 2009/7/1
DOI https://doi.org/10.11477/mf.1416100530
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Abstract

 We report 2 cases of hypoxic ischemic encephalopathy with atypical findings on computed tomographic (CT) and magnetic resonance (MR) imaging for the acute to subacute stage. Case 1: A 78-year-old man with larynx cancer suffered cardiac arrest after suffocation. Cardiopulmonary resuscitation, was performed; the patient then went into a deep coma and also developed severemyoclonus. CT scans on day 0 and day 3 after the arrest revealed no abnormalities MR imaging was performed on day 13 to evaluate cerebral anoxia; however, no abnormal findings were obtained. Since no abnormalities were detected both on CT and MR imaging, we expected that the prognosis would be good; however, the patients did not recover from coma and remains in a persistent vegetative state. Case 2: A 54-year-old man developed cardiac arrest after anaphylactic shock caused by insect bite. After cardiopulmonary resuscitation, the patient lapsed into a deep coma. CT scans performed on day 1 and 3 after the cardiac arrest revealed slight subarachnoid hemorrhage at the surface of the right cerebral cortex along the falx cerebri. MR images obtained on day 10 demonstrated slight hemorrhage at the surface of right cerebral cortex, but no abnormalities in basal ganglia, thalamus, cortex, and white matter. The transient damage of the blood brain barrier caused by hypoxia and ischemia was thought to induce the slight subarachnoid hemorrhage after cardiopulmonary resuscitation. The patient demonstrated early recovery and was almost completely recovered with slight agnosia. MR imaging to rule out hypoxic-ischemic encephalopathy may not have been timed appropriately in both the case, our radiological findings are usual as compare to the findings presented in other similar reports. The variations in the findings of CT and MR imaging in the case of hypoxic-ischemic encephalopathy should be clarified, and the prognosis and management of this condition should be planned on the basis of not only the neuroradiological images but also the neurological signs and symptoms.

(Received: November 20,2008,Accepted: January 30,2009)


Copyright © 2009, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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