====== Planum sphenoidale meningioma magnetic resonance imaging ======

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On MRI, the [[Planum sphenoidale meningioma]] appears hypo to isointense on T1-weighted imaging and possesses variable signal intensity on T2-weighted images. Gadolinium MR imaging demonstrates intense homogeneous or heterogeneous enhancement of the tumor, with well-circumscribed margins. 
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[[Extraaxial]] [[space-occupying lesion]] measuring 3.8 x 3.8 x 2.6 cm with a dural base on the [[planum sphenoidale]] and [[olfactory groove]] compatible with [[planum sphenoidale meningioma]] or [[olfactory groove meningioma]]. Most of the lesion shows intense [[enhancement]], with some areas without enhancement attributable to [[cyst]]ic-necrotic changes. [[Diffusion]] shows a peripheral component with low values ​​on the [[ADC]] map and a central component with high values ​​that suggest [[hypercellularity]] and hypocellularity, respectively. [[Dural tail]] extending to the [[tuberculum sellae]] is also seen.

It conditions extensively [[edema]] in the [[white matter]] of both [[frontal lobe]]s and knee of the [[corpus callosum]] and obliteration of the frontal grooves.

Associated [[sclerosis]] of the [[sphenoid sinus]]. No bone or brain [[invasion]] is seen. The posterior margin of the lesion is adjacent to the intracranial segment of both [[optic nerve]]s, with no compression of the [[optic pathway]]. The A2 segment of both [[anterior cerebral artery]] contacts the posterior margin of the lesion. [[Ventricular system]]: normal size and morphology for the patient's age. Midline and basal cyternae: normal.

Chronic ischemic lesions in the lower region of the left cerebellar hemisphere (territory of the left posterior inferior cerebellar artery). Preserved arterial flow vacuum.