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Posterior Fossa Syndrome
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Occurs in approx. 15-25% of midline medulloblastomas
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Onset usually within 12-24 hrs of surgery
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Slowly improves, but significant long term morbidity
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Results from surgical damage to the efferent cerebellar
pathways
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Correlated with hypertrophic olivary degeneration (inferior
olivary nuclei)
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? Damage to dentate nuclei/superior cerebellar peduncles
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May see decreased CBF in frontal lobes