Right cerebellopontine angle cistern tumor treatment planning. There is an extraaxial, enhancing mass centered in the right cerebellopontine angle cistern, with extension into the internal auditory canal, which measures 20 mm AP x 28 mm RL x 15 mm SI. There is mild mass effect upon the right brainstem and cerebellar hemisphere. There is encephalomalacia in the left middle and inferior frontal gyri, small areas of encephalomalacia in the bilateral basal ganglia and corona radiata, and patchy areas of periventricular white matter T2 hyperintensity in the bilateral frontal lobes. There is diffuse cerebral volume loss. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are grossly unremarkable. There is mild mucosal thickening in the left maxillary sinus.
1. Preoperative planning MRI for a right vestibular schwannoma that measures up to 28 mm.2. Chronic left frontal lobe and bilateral corona radiata and basal ganglia lacunar infarcts, superimposed upon an background of probable chronic small vessel ischemic disease, although incompletely characterized on this limit planning MRI.