Malignant meningioma

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Malignant meningioma is a rare, fast-growing

The World Health Organization classification system defines both grade II and grade III meningiomas as malignant. Historically, histological subtypes have also been used in classification including:

• clear cell (WHO grade II),
• chordoid (WHO grade II),
• rhabdoid (WHO grade III), and
• papillary (WHO grade III)

Benign or low grade meningiomas (WHO grade I) include meningothelial, fibrous, transitional, psammomatous, angiomatous, microcystic, secretory, lymphoplasmacyte-rich, and metaplastic.

References

• Malignant meningioma entry in the public domain NCI Dictionary of Cancer Terms

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