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Arab Board Neurosurgery Final Written Practice Questions - Arab Board Neurosurgery Final Written Examination Exam

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A 52-year-old female presents with progressive hearing loss and ataxia. Brain MRI demonstrates a 3.8 cm cerebellopontine angle mass filling the internal auditory canal and cerebellopontine cistern, displacing the brainstem and deforming the fourth ventricle. What is the Koos classification grade of this vestibular schwannoma?
Correct Answer:
Koos Grade IV

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