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A STUDY ON REDUCTION RATE OF TUMOR VOLUME BY IRRADIATION IN GERMINOMA, MALIGNANT LYMPHOMA, AND MEDULLOBLASTOMA Kikuo Ohno 1 , Ryuta Suzuki 1 , Hiroyuki Masaoka 1 , Shuichi Tomida 1 , Toshinari Arai 1 , Taketoshi Maehara 1 , Jun Saito 1 , Kimiyoshi Hirakawa 1 1Department of Neurosurgery Tokyo Medical and Dental University Keyword: germinoma , malignant lymphoma , medulloblastoma , irradiation , CT pp.1041-1047
Published Date 1990/11/1
DOI https://doi.org/10.11477/mf.1406900120
  • Abstract
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A relationship between radiation dose and re-duction rate of tumor volume was studied in 10 pa-tients with germinoma, nine with malignant lym-phoma, and seven with medulloblastoma, in order to evaluate the effect of irradiation on these tu-mors.

Germinomas showed either mono- or biphasic reduction of the volume with increased radiation dose in semi-logarithmic expression, irrespective of their size. All patients are well without relapse except for one that was lost because of transfer.

The reduction rate of tumor volume was slightly less in malignant lymphomas and medulloblastomas than that in germinomas and the former two show-ed less uniformity of response to irradiation ac-cording to each case. Malignant lymphomas tended to regrow during irradiation period or early after the period and the effect of irrdiation seemed to be related to the size of the tumor. Medulloblasto-mas did not completely disappeared during irradia-tion period, but delayed effect of irradiation was recognized after the period.


Copyright © 1990, 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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