Right vestibular schwannoma status post surgery: surveillance. There are postoperative findings related to right retrosigmoid craniotomy for resection of a right vestibular schwannoma. There is unchanged nodular enhancement within the right internal auditory canal that measures approximately 6 mm and a band of enhancing tissue along the resection margins in the right cerebellopontine angle cistern that measures up to 3 mm in thickness and is inseparable from what remains of the cranial nerve 7 and 8 complex. There is unchanged prominence of the right lateral posterior fossa cerebrospinal fluid space and flattening of the right cerebellar hemisphere. There is no evidence of acute infarct. There are a few unchanged scattered patchy foci of T2 intensity within the supratentorial white matter, which may represent chronic small vessel ischemic disease. The ventricles are unchanged in size and configuration. There is no midline shift or herniation. There are subcentimeter right middle cerebral artery bifurcation left M1 segment aneurysms.
1. Unchanged residual portions of the right vestibular schwannoma in the right internal auditory canal and cerebellopontine angle cistern and other postoperative findings. 2. Subcentimeter right middle cerebral artery bifurcation left M1 segment aneurysms.