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==Overview==
==Overview==
Meningioma may be classified according to the histological criteria of the WHO into 3 groups: [[benign]] classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and [[anaplastic]] malignant meningioma (WHO grade 3). Meningioma may also be classified according to the [[tumor]] location into 2 main subtypes: intradural and extradural meningioma.<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25th 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25th 2015</ref>
Meningioma may be classified according to the histological criteria of the WHO into 3 groups: [[benign]] classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and [[anaplastic]] malignant meningioma (WHO grade 3). Meningioma may also be classified according to the [[tumor]] location into 2 main subtypes: intradural and extradural meningioma.<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25 2015</ref>


==Classification==
==Classification==
*Meningioma may be classified according to the histological criteria of the WHO into 3 groups: [[benign]] classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and [[anaplastic]] malignant meningioma (WHO grade 3).<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25th 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25th 2015</ref>
*Meningioma may be classified according to the histological criteria of the WHO into 3 groups: [[benign]] classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and [[anaplastic]] malignant meningioma (WHO grade 3).<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25 2015</ref>
:*Benign classic meningiomas are low-grade (WHO grade I) tumors that grow very slowly and rarely invade the surrounding [[tissues]].
:*Benign classic meningiomas are low-grade (WHO grade I) tumors that grow very slowly and rarely invade the surrounding [[tissues]].
:*Atypical meningioma (WHO grade 2) are not clearly [[malignant]], but grow faster than benign meningiomas.
:*Atypical meningioma (WHO grade 2) are not clearly [[malignant]], but grow faster than benign meningiomas.
:*Anaplastic malignant meningioma (WHO grade 3) tend to grow rapidly and invade the surrounding  tissue.<ref name="C">Meningioma. Canadian Cancer Society(2015) http://www.cancer.ca/en/cancer-information/cancer-type/brain-spinal/brain-and-spinal-tumours/meningioma/?region=mb Accessed on September, 25th 2015</ref>
:*Anaplastic malignant meningioma (WHO grade 3) tend to grow rapidly and invade the surrounding  tissue.<ref name="C">Meningioma. Canadian Cancer Society(2015) http://www.cancer.ca/en/cancer-information/cancer-type/brain-spinal/brain-and-spinal-tumours/meningioma/?region=mb Accessed on September, 25 2015</ref>




*The table below lists the subtypes of meningioma according to the WHO grades:<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25th 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25th 2015</ref><ref name="C">Meningioma. Canadian Cancer Society http://www.cancer.ca/en/cancer-information/cancer-type/brain-spinal/brain-and-spinal-tumours/meningioma/?region=mb September, 25th 2015</ref>
*The table below lists the subtypes of meningioma according to the WHO grades:<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25 2015</ref><ref name="C">Meningioma. Canadian Cancer Society http://www.cancer.ca/en/cancer-information/cancer-type/brain-spinal/brain-and-spinal-tumours/meningioma/?region=mb September, 25 2015</ref>
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*Meningioma may also be classified according to the [[tumor]] location into 2 main subtypes: intradural and extradural meningioma.<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25th 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25th 2015</ref>
*Meningioma may also be classified according to the [[tumor]] location into 2 main subtypes: intradural and extradural meningioma.<ref name="Wiki">Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25 2015</ref><ref name="L">Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25 2015</ref>


==References==
==References==

Revision as of 18:37, 1 October 2015

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]

Overview

Meningioma may be classified according to the histological criteria of the WHO into 3 groups: benign classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and anaplastic malignant meningioma (WHO grade 3). Meningioma may also be classified according to the tumor location into 2 main subtypes: intradural and extradural meningioma.[1][2]

Classification

  • Meningioma may be classified according to the histological criteria of the WHO into 3 groups: benign classic meningioma (WHO grade 1), atypical meningioma (WHO grade 2), and anaplastic malignant meningioma (WHO grade 3).[1][2]
  • Benign classic meningiomas are low-grade (WHO grade I) tumors that grow very slowly and rarely invade the surrounding tissues.
  • Atypical meningioma (WHO grade 2) are not clearly malignant, but grow faster than benign meningiomas.
  • Anaplastic malignant meningioma (WHO grade 3) tend to grow rapidly and invade the surrounding tissue.[3]


  • The table below lists the subtypes of meningioma according to the WHO grades:[1][2][3]
WHO grade Subtypes

Benign classic meningioma
(WHO grade 1)

Meningothelial meningioma, fibroblastic meningioma, transitional meningioma, psammomatous,
angiomatous meningioma, microcystic meningioma, secretory meningioma, lymphoplasmacyte-rich meningioma, metaplastic meningioma

Atypical meningioma
(WHO grade 2)

Choroid meningioma, clear cell meningioma

Anaplastic malignant meningioma
(WHO grade 3)

Rhabdoid meningioma, papillary meningioma

  • Meningioma may also be classified according to the tumor location into 2 main subtypes: intradural and extradural meningioma.[1][2]

References

  1. ↑ 1.0 1.1 1.2 1.3 Meningioma diagnosi. Wikipedia(2015) https://en.wikipedia.org/wiki/Meningioma#History_and_nomenclature Accessed on September, 25 2015
  2. ↑ 2.0 2.1 2.2 2.3 Meningioma. Liberpathology(2015) http://librepathology.org/wiki/index.php/Meningioma#Quick_overview Accessed on September, 25 2015
  3. ↑ 3.0 3.1 Meningioma. Canadian Cancer Society(2015) http://www.cancer.ca/en/cancer-information/cancer-type/brain-spinal/brain-and-spinal-tumours/meningioma/?region=mb Accessed on September, 25 2015
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