 Redemonstration of left intracranial/cisternal optic nerve and optic chiasm mass. The mass demonstrate regions of solid and enhancing tumor, foci of solid and partially enhancing tumor as well as cystic component. The tumor extends from the cisternal component of left optic nerve superiorly along the anterior aspect of supraclinoid internal carotid artery, superiorly into the basal cistern/hypothalamic region and posteriorly into the interpeduncular cistern and laterally into the proximal horizontal segment of left sylvian fissure. The tumor also has a small subfrontal component similar to prior exam. There is intrinsic T1 hyperintensity at the region of hypothalamus compatible with calcification. There is stable to minimal decrease in the size of the left paraclinoid enhancing component now measuring 13 x 14 x 13 mm in AP, transverse, and CC dimensions. It previously measured 13 x 17 x 16 mm. There is slight increase in the size of the cystic components just anterior to the interpeduncular cistern measuring 8 x 9 mm in AP and CC dimensions, previously 6 x 7 mm. Separate adjacent enhancing nodular component is without significant change from prior study.There is cystic collection in the middle cranial fossa, which follows near CSF characteristics. This collection has minimally decreased in size.No diffusion-weighted abnormalities are identified. There is no evidence for intracranial hemorrhage. The ventricles and sulci are normal in size. Flow voids re present within the major vessels indicating patency. Left maxillary mucous retention cyst.
1.Redemonstration of mixed signal intensity and pattern of enhancement of an irregular mass arising from the cisternal component of the left optic nerve and with involvement of the optic chiasm, extension into the interpeduncular cistern/hypothalamic region and minimally into the left subfrontal region and laterally into the proximal sylvian fissure. Left paraclinoid enhancing component is slightly decreased in size. Slight increase in the size of the cystic component anterior to the interpeduncular cistern. Adjacent nodular enhancing component is stable in size. 2.Cystic collection in the left medial middle cranial fossa follows near CSF characteristics and slightly decreased in size.3.No evidence of any additional new lesions since prior exam.