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Extra-Axial Lesions
Select the location of your mass lesion in the boxes below:

Extra-axial
Cerebello-pontine angle
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Mass within the cerebellopontine angle
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Often displacing the cerebellum dorsally and pons ventrally
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Often in close association with the choroid plexus of the 4th ventricle

Extra-axial
Cribriform plate
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Broadbase mass at the level of the cribriform plate
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Can extend into the ethmoidal region of the nasal cavity
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