Diagnosis: Benign neoplasm of meninges, unspecifiedClinical question: hx meningioma eval for changeSigns and Symptoms: none- surveillance imaging There is redemonstration of an extra-axial mass measuring 29 x 23 mm sagittal dimensions and 23 x 23 and millimeters axial dimensions on the current exam and similar dimensions on the prior exam located at the left cerebellopontine angle cistern and extending upwards to the left perimesencephalic cistern which displaces the pons medially and the cerebral peduncle superiorly. There is some extension of this mass into the left internal auditory canal along its anterior aspect. There is redemonstration and no change and T2 and FLAIR signal hyperintensity within the left middle cerebellar peduncle as well as the left superior cerebellar peduncle.There is a mild degree of periventricular and subcortical punctate hyperintense white matter lesions present identified on the FLAIR and T2 images.Incidental note is made of partial empty sellaNormal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells demonstrate partial opacification of the the left mastoid air cells. The visualized portions of the orbits are intact.
1.There is an extra-axial mass present in the posterior fossa on the left side which most likely represents a meningioma. It is stable compared to the prior exam. It affects the left internal auditory canal and displace and compress the brainstem.2.Periventricular and subcortical white matter signal changes of a mild degree are present which are nonspecific. They could be vascular related, related to demyelination, trauma, vasculitis, sarcoid. They are nonspecific. 