Classification system of foramen magnum meningiomas
Background: Foramen magnum meningiomas (FMMs) are challenging tumors. We report a classification system based on our experience of 107 tumors. Materials and Methods: The three main algorithm criteria included the compartment of development of the tumor, its dural insertion, and its relation to the...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wolters Kluwer Medknow Publications
2010-01-01
|
Series: | Journal of Craniovertebral Junction and Spine |
Subjects: | |
Online Access: | http://www.jcvjs.com/article.asp?issn=0974-8237;year=2010;volume=1;issue=1;spage=10;epage=17;aulast=Bruneau |
id |
doaj-a422a276a1e74c0e9f562cf1ff93ed46 |
---|---|
record_format |
Article |
spelling |
doaj-a422a276a1e74c0e9f562cf1ff93ed462020-11-25T00:28:42ZengWolters Kluwer Medknow PublicationsJournal of Craniovertebral Junction and Spine0974-82372010-01-0111101710.4103/0974-8237.65476Classification system of foramen magnum meningiomasM BruneauB GeorgeBackground: Foramen magnum meningiomas (FMMs) are challenging tumors. We report a classification system based on our experience of 107 tumors. Materials and Methods: The three main algorithm criteria included the compartment of development of the tumor, its dural insertion, and its relation to the vertebral artery. Results: The compartment of development was most of the time intradural (101/107, 94.4%) and less frequently extradural (3/107, 2.8%) or both intra-extradural. (3/107, 2.8%). When developed inside the intradural compartment, FMMs were subdivided into posterior (6/104, 5.8%), lateral (57/104, 54.8%), and anterior (41/104, 39.4%), if their insertion was respectively posterior to the dentate ligament, anterior to the dentate ligament without or with extension over the midline. Anterior and lateral intradural lesions grew below (77/98, 78.6%), above (16/98, 16.3%), or on both sides (5/98, 5.1%) of the VA. Only three cases of extraduralFMMs (3/107, 2.8%) were resected by an antero-lateral approach while all the other ones (104/107, 97.2%) were removed successfully by a postero-lateral approach. Lower cranial nerves were displaced superiorly in FMM growing below the VA but their position cannot be anticipated in other situations. Conclusions: This classification system helps for defining the best surgical approach but also for anticipating the position of the lower cranial nerves and therefore for reducing the surgical morbidity.http://www.jcvjs.com/article.asp?issn=0974-8237;year=2010;volume=1;issue=1;spage=10;epage=17;aulast=BruneauClassificationforamen magnummeningiomasurgical approachtumor - vertebral artery |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M Bruneau B George |
spellingShingle |
M Bruneau B George Classification system of foramen magnum meningiomas Journal of Craniovertebral Junction and Spine Classification foramen magnum meningioma surgical approach tumor - vertebral artery |
author_facet |
M Bruneau B George |
author_sort |
M Bruneau |
title |
Classification system of foramen magnum meningiomas |
title_short |
Classification system of foramen magnum meningiomas |
title_full |
Classification system of foramen magnum meningiomas |
title_fullStr |
Classification system of foramen magnum meningiomas |
title_full_unstemmed |
Classification system of foramen magnum meningiomas |
title_sort |
classification system of foramen magnum meningiomas |
publisher |
Wolters Kluwer Medknow Publications |
series |
Journal of Craniovertebral Junction and Spine |
issn |
0974-8237 |
publishDate |
2010-01-01 |
description |
Background: Foramen magnum meningiomas (FMMs) are challenging tumors. We report a classification system based on our experience of 107 tumors. Materials and Methods: The three main algorithm criteria included the compartment of development of the tumor, its dural insertion, and its relation to the vertebral artery. Results: The compartment of development was most of the time intradural (101/107, 94.4%) and less frequently extradural (3/107, 2.8%) or both intra-extradural. (3/107, 2.8%). When developed inside the intradural compartment, FMMs were subdivided into posterior (6/104, 5.8%), lateral (57/104, 54.8%), and anterior (41/104, 39.4%), if their insertion was respectively posterior to the dentate ligament, anterior to the dentate ligament without or with extension over the midline. Anterior and lateral intradural lesions grew below (77/98, 78.6%), above (16/98, 16.3%), or on both sides (5/98, 5.1%) of the VA. Only three cases of extraduralFMMs (3/107, 2.8%) were resected by an antero-lateral approach while all the other ones (104/107, 97.2%) were removed successfully by a postero-lateral approach. Lower cranial nerves were displaced superiorly in FMM growing below the VA but their position cannot be anticipated in other situations. Conclusions: This classification system helps for defining the best surgical approach but also for anticipating the position of the lower cranial nerves and therefore for reducing the surgical morbidity. |
topic |
Classification foramen magnum meningioma surgical approach tumor - vertebral artery |
url |
http://www.jcvjs.com/article.asp?issn=0974-8237;year=2010;volume=1;issue=1;spage=10;epage=17;aulast=Bruneau |
work_keys_str_mv |
AT mbruneau classificationsystemofforamenmagnummeningiomas AT bgeorge classificationsystemofforamenmagnummeningiomas |
_version_ |
1725334782196318208 |