Loading Stack -
0 images remaining
Enhancing hyperdense mass in the left anterior cranial fossa measures ~4cm in diameter. This is broad-based to the left side of the olfactory groove and planum sphenoidale inferiorly. There is the suggestion of minimal hyperostosis at the interface between bone and tumour.
Surrounding the lesion there is extensive hypoattenuation in the white matter of the left frontal lobe extending into the corpus callosum, anterior limb left internal capsule, and left external capsule.
There is extensive mass-effect with diffuse sulcal effacement in both hemispheres, subfalcine and uncal herniation, and 1.3 centimetres of midline shift to the right. The left lateral ventricle and third ventricle are almost completely effaced. There is dilatation of the body, trigone, and temporal horn of right lateral ventricle.
No evidence of acute haemorrhage or acute infarction.
Large left anterior cranial fossa mass. Given the broad contact with the skull base is most probably extra-axial, although a rim of grey matter surrounding the tumour is not seen.
Olfactory groove meningioma is considered most likely. Extensive white matter hypoattenuation probably represents vasogenic oedema although parenchymal invasion by aggressive meningioma is also a possibility.