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there is an inhomogeneous mass showing predominantly peripheral enhancement, involving the medulla, pons, the left cerebellar peduncles, as well as the vermis
the lesion also infiltrates the fourth ventricle causing moderate dilatation of the intracerebral CSF spaces cranially
the intraorbital part of the right optic nerve, as well as the retroorbital segment os the left optic nerve shows fusiform dilatation without abnormal enhancement. Considering the family history these findings are in line with bilateral optic gliomas
the right perioptic CSF space is distended