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Radiation-induced Brain Injury Akio Asai 1 , Keiji Kawamoto 2 1Department of Neurosurgery, Hirakata Hospital, Kansai Medical University 2Department of Neurosurgery, Takii Hospital, Kansai Medical University Keyword: radiation-induced brain injury , radiation encephalopathy , radiation necrosis , leukoencephalopathy , neural stem cells , dementia pp.123-129
Published Date 2008/2/1
DOI https://doi.org/10.11477/mf.1416100219

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Abstract

 Radiation-induced brain injury is a life-threatening or at least QOL-compromising pathological entity induced by therapeutic irradiation to malignant brain tumors. Although life-threatening late delayed radiation necrosis and radiation-induced leukoencephalopathy had been assumed to be major complications of radiation therapy to the brain classically, these complications seem to be less frequently seen in therapeutic irradiation to the brain recently because in many treatment protocols to brain tumors, irradiation field is now confined to tumors and their margins and adjuvant chemotherapy consisting of methothrexate etc. has been avoided as much as possible. Instead, less aggressive but still QOL-compromising encephalopathy has been recognized for the past 20 years. This encephalopathy occurs in senior adults several months after the extended field irradiation with even less amount of irradiation dose such as 40 Gy whole brain irradiation. This encephalopathy is characterized by cognitive impairment and brain atrophy which attenuates QOL of the patients. In this article, these radiation-induced brain injuries are reviewed clinically, etiologically and hisotopathologically based on reports in the literature.


Copyright © 2008, 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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