Skull base schwannoma
Right hypoglossal nerve palsy ?cause
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Lobulated, well-defined, high T2 isointense T1, enhancing right skull base lesion involving the petrous apex, clivus and occipital condyle. There is involvement of the internal acoustic canal, jugular foramen and hypoglossal canal. Meckel's cave is displaced superiorly by the mass. A portion of the mass extends into the infratemporal fossa via the jugular/hypoglossal foramina. There is atrophy of the right side of the tongue with high T2 and T1 signal in keeping with chronic right hypoglossal nerve palsy.
Pathologically proven skull base schwannoma with associated hypoglossal nerve denervation.