Colloid cyst, questionable history of aneurysm. Again seen is an approximately 10 x 6 x 8 mm (AP by craniocaudal by transverse) nonenhancing lesion centered along the leftward aspect of the foramen of Monroe. The lesion is isointense on T1 with mixed intensity on T2 and high density on prior CT. Ventricular sizes remain normal without evidence of obstructive hydrocephalus at this time.There are scattered punctate foci of T2 hyperintensity primarily within subcortical white matter without associated mass effect, restricted diffusion, susceptibility abnormality, or enhancement. There are no additional masses or evidence of mass effect. No evidence of acute infarct or hemorrhage. Flow voids are present within the major vessels indicating patency. There is no abnormal enhancement within the brain. The paranasal sinuses and mastoid air cells are clear.
1. A 10 mm likely colloid cyst centered in the left foramen of Monro appears unchanged in size since prior examination from 9/30/2016. 2. Mild chronic small vessel ischemic disease.