Ipsilateral cerebellar atrophy can be found in infratentorial GGs involving the middle and inferior cerebellar peduncles. GGs should therefore be considered in the differential diagnoses when a solid-cystic mass with calcification is encountered in the cerebellum. Brainstem GGs tend to be smaller, solid masses with moderate-to-marked enhancement. Dorsal-predominant and posterior-marginal enhancement may be the specific imaging findings for brainstem GGs.
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