 There is an unchanged ovoid, homogeneously enhancing, extra-axial mass centered in the left prepontine cistern. The mass is measures up to 13 mm, previously also 13 mm. There is unchanged mass effect on the left pons, left oculomotor nerve, left posterior cerebral artery, and left cerebral peduncle. However, the intracranial portion of the left trigeminal nerve appears to be intact. There are a few scattered T2 hyperintensities in the subcortical and periventricular white matter. The ventricles are unchanged in size and configuration. There is no midline shift or herniation. There are small mucous retention cysts in the bilateral maxillary sinuses. The orbits, skull, and scalp soft tissues are grossly unremarkable.
1. Unchanged mass centered in the left prepontine cistern.2. Stable mild probable chronic small vessel ischemic disease.