Classification of Meningiomas in the Cerebellopontine Angle

  • Arasho Belachew
  • Tumul Chowdhury
  • Toma Spiriev
  • Nora Sandu
  • Bernhard SchallerEmail author
Part of the Tumors of the Central Nervous System book series (TCNS, volume 14)


Meningiomas represent the second most common type of neoplasm of the cerebellopontine angle (CPA). Their relationship to critical neural or vascular structures of the cpa is variable and they present with different signs and symptoms. The retromeatal located CPA meningiomas show a significantly larger tumour size and the diagnosis is made later compared to premeatally located CPA meningiomas. Before the operation, a reduction of the facial nerve function and hearing function is present significantly more often in premeatal CPA meningiomas. The clinical appearance of the retromeatal CPA meningiomas is dominated by cerebellar symptoms. Both preoperative and postoperative impairment of facial nerve and auditory function prevailed in the premeatal group. The topological classification of CPA-meningiomas according to their location anterior or posterior to the internal auditory canal is important, because the clinical presentation, the surgical strategy to be applied, and the functional outcome of critical neural structures as well as the occurence of the trigeminocardiac reflex differ between the two subtypes. These substantial differences in relation to meningioma location within the CPA provide substantial evidence for the paradoxical observation that premeatal CPA meningiomas have a significantly worse postoperative functional outcome compared to retromeatal meningiomas although premeatal meningiomas become already symptomatic earlier and at smaller sizes.


Facial Nerve Mean Arterial Blood Pressure Vestibular Schwannoma Internal Auditory Canal Vestibular Schwannomas 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Arasho Belachew
    • 1
  • Tumul Chowdhury
    • 2
  • Toma Spiriev
    • 3
  • Nora Sandu
    • 3
  • Bernhard Schaller
    • 3
    Email author
  1. 1.Department of NeurologyUniversity of AddisAbbebaEthiopia
  2. 2.Department of Anesthesia and Perioperative MedicineUniversity of ManitobaWinnipegCanada
  3. 3.Departments of NeurosurgeryUniversity of ParisParisFrance

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