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Occupying the right anterior cranial fossa/anterior aspect of the middle cranial fossa and extending across the midline into the left anterior cranial fossa, there is a lobulated mass measuring 8.8 x 4.0 x 7.1cm. This is slightly hyperintense to cortex on T1 and isointense to cortex on T2 and FLAIR, and demonstrates avid contrast enhancement. The mass is favoured to be extra-axial. Within the mass, there is a rounded region of increased diffusion restriction (ADC = 650 x 10-6 mm2/s), possibly reflecting a region of higher cellularity. No invasion of the orbital apex. The right frontal lobe is compressed and demonstrates a large amount of edema. The right lateral and third ventricles are compressed and there is 26mm leftward midline shift with subfalcine herniation. No definite osseous invasion appreciated.
Large right frontal/anterior temporal mass with significant mass effect is favoured to represent a meningioma. Haemangiopericytoma, and even less likely would be lymphoma in the differential disagnosis.