Malignant meningioma

Malignant meningioma is a rare, fast-growing tumor that forms in one of the inner layers of the meninges (thin layers of tissue that cover and protect the brain and spinal cord). Malignant meningioma often spreads to other areas of the body.

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.

External links

 This article incorporates public domain material from the U.S. National Cancer Institute document "Dictionary of Cancer Terms".





Wikimedia Foundation. 2010.

Look at other dictionaries:

  • malignant meningioma — A rare, fast growing tumor that forms in one of the inner layers of the meninges (thin layers of tissue that cover and protect the brain and spinal cord). Malignant meningioma often spreads to other areas of the body …   English dictionary of cancer terms

  • Meningioma — Classification and external resources A contrast enhanced CT scan of the brain, demonstrating the appearance of a Meningioma. ICD 10 C70, D32 …   Wikipedia

  • Malignant peripheral nerve sheath tumor — Classification and external resources Micrograph of malignant peripheral nerve sheath tumour with the typical herringbone pattern. H E stain …   Wikipedia

  • Meningioma — A type of brain tumor that starts within the meninges. These slow growing tumors are sometimes associated with prior head trauma. * * * A benign, encapsulated neoplasm of arachnoidal origin, occurring most frequently in adults; most frequent form …   Medical dictionary

  • meningioma — n. a benign tumour arising from the fibrous coverings of the brain and spinal cord (meninges). It is usually slow growing and produces symptoms by pressure on the underlying nervous tissue. In the brain the tumour may cause focal epilepsy and… …   The new mediacal dictionary

  • meningioma — noun a tumor arising in the meninges which surround the brain and spinal cord; usually slow growing and sometimes malignant • Hypernyms: ↑tumor, ↑tumour, ↑neoplasm …   Useful english dictionary

  • chordoid meningioma — a rare, moderately malignant type of meningioma characterized histologically by cells in lobules and chains resembling those of a chordoma …   Medical dictionary

  • clear cell meningioma — a rare, moderately malignant type of meningioma characterized histologically by clear cells …   Medical dictionary

  • papillary meningioma — a rare, malignant type of meningioma characterized by cells in a papillary configuration, often with necrosis or cyst formation …   Medical dictionary

  • rhabdoid meningioma — a rare, malignant type of meningioma characterized histologically by rhabdoid cells with eccentric nuclei; these are most often seen as recurrences of formerly benign meningiomas …   Medical dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.