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Japanese

"DOUGHNUT SIGN" IN BRAIN SCANNING Jyoji Handa 1 , Hajime Handa 1 1Department of Neurosurgery, Kyoto University Medical School pp.803-806
Published Date 1970/7/1
DOI https://doi.org/10.11477/mf.1406202750
  • Abstract
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An atypical radioisotopic image in brain scanning, the "doughnut sign", consists of the zone of increased uptake containing a central core of decreased acti-vity. Seven cases were found in 185 positive brain scans (3.8%) performed in the past 3 years. If all examinations performed during the period are considered, the incidence is 7 of 650 or 1.1%. The series includes 2 meningiomas, 2 glioblastomas, and 1 each of oligodendroglioma, cerebral infarction and encephalitis.

The "doughnut sign" has apparently no signi-ficant diagnostic value but seems to suggest that the pathologic focus contains avascular central core in most of cases.


Copyright © 1970, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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