Abstract
An 11-year-old boy with left spastic hemiplegia and learning difficulty was reported. Changes of his character appeared first, followed by atrophy of the left upper and lower extremities. Exaggerated deep tendon reflexes and positive Babinski sign were present on the left extremities, but sensory disturbances and ataxia were absent. There was no denervation pattern in EMG. Brain CT revealed a high density area in the right basal ganglia and enlarged right lateral ventricle without shift of the midline.
This high density area on CT gradually became conspicuous within 6 months without a mass effect or shift of the midline. CSF cytology was negative and stereotaxic biopsy revealed two cell pattern germinoma of basal ganglia.
