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Japanese

Foramen magnum meningioma of ventral type Iwao YAMAKAMI 1 , Akira YAMAURA 1 , Takao NAKAMURA 2 , Katsumi ISOBE 3 , Masanori SATOU 4 1Department of Neurosurgery, Chiba University School of Medicine 2Department of Neurosurgery, Kasori Hospital 3Department of Neurosurgery, Kimitsu-Chuo Hospital 4Department of Neurosurgery, Kasima-Rousai Hospital Keyword: foramen magnum , magnetic resonance imaging , meningioma , posterolateral approach pp.335-340
Published Date 1996/4/10
DOI https://doi.org/10.11477/mf.1436901190
  • Abstract
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We reviewed the clinical findings and the surgical re-sults of five cases of patients with foramen magnum meningioma of ventral type who underwent preopera-tive magnetic resonance imaging (MRI) and tumor re-moval by the posterolateral approach. Patients showed a variety of neurological symptoms and signs including dysesthesia of extremities, but the neurological diagno-sis could not determine the dominant side of the tumor. MRI determined the dominant side of the tumor and this side was chosen as the side of the surgical approach. By MRI findings of the extent of the tumor in the posterior fossa and the spinal canal, patients were classified into three cases of craniospinal type and two cases of spinocranial type. The result of tumor re-moval by the posterolateral approach was a total re-moval in the two cases of spinocranial type and a “near-total” removal in the three cases of craniospinal type. There was no surgical mortality and the surgical morbidity was negligible. The foramen magnum meningioma of ventral type, especially of the spinocra-nial type, can be managed safely and satisfactorily by the posterolateral approach.


Copyright © 1996, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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