Given the patient's age and lack of symptoms (vertigo was felt to be incidental to this mass), histology is not available for confirmation. This mass has all the characteristics of a meningioma, just in an uncommon position. Seeing a normal pineal gland would be further reassuring but this is unlikely to be pineal in origin because it displaces the internal cerebral veins inferiorly, whereas a pineal gland mass would displace the internal cerebral veins superiorly.