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Translabyrinthine approach craniotomy and resection of the right acoustic neuroma noted with expected postoperative changes, including a small amount of pneumocephalus. Grey-white matter differentiation is preserved. Ventricles and basal cisterns are normal. No midline shift or cerebral herniation.
Dense right internal jugular vein highly suspicious for thrombosis; right sigmoid and transverse sinuses are unremarkable for a noncontrast study.
Conclusion: Features suggestive of right internal jugular vein thrombosis.