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SO-CALLED ARACHNOIDAL SARCOMA OF THE CEREBELLUM ITS HISTOGENESIS AND CLINICAL COMPARISON WITH CLASSICAL MEDULLOBLASTOMA Tohru Soejima 1 , Masashi Fukui 1 , Katsutoshi Kitamura 1 1Department of Neurosurgery, Faculty of Medicine, Kyushu University pp.1275-1283
Published Date 1973/10/1
DOI https://doi.org/10.11477/mf.1406203388

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  • Abstract
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Three cases of cerebellar tumor named "arach-noidal sarcoma of the cerebellum" or "desmoplastic medulloblastoma" were reported. Histologically, this tumor is characterized by islands of cells sur-rounded by and delineated from the rest of the tumor cells. In the island, there are no reticulin fibers, while the tumor tissue surrounding the islands demonstrated an elaborate network of reti-culin fibers. The tumor cells in the island are essentially identical with the cells of classical medulloblastoma under light as well as electron microscope. By electron microscopic observation, each group of the tumor cells was encircled and separated from the connective tissue element by a basement membrane. From these findings, the tumor called "arachnoidal sarcoma of the cerebel-lum" or "desmoplastic medulloblastoma" should be of neuroectodermal origin.

This tumor was discussed from clinical stand point comparing with classical medulloblastoma. The authors did not find any difference between this tumor and the classical medulloblastoma in age distribution, location, tendency to encapsulation and in consistency. The prognosis of both tumors was thought to be better in adults than children, and desmoplastic medulloblastoma seemed to have a slightly favorable prognosis than the classical medulloblastoma.


Copyright © 1973, 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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