 Redemonstrated are postoperative findings related to right suboccipital and translabyrinthine craniectomy with fat graft for debulking of a right cerebellopontine angle tumor. Residual tumor within the cerebellopontine angle has decreased in size now measuring up to 3.5 cm in maximal dimension (previously 4 cm.) Enhancement within the skeletonized right internal auditory canal has become more defined and also extends along the operative tract (best visualized fat-saturated axial T1 series 19, image 9-10). As before, there are scattered areas of susceptibility effect within the residual tumor, which likely correspond to blood products, particularly along the surgical margins. Mass effect upon the adjacent brainstem and right cerebellar hemisphere, with leftward displacement of the vertebrobasilar system as well as partial effacement of the fourth ventricle, has slightly decreased over the interval. There has also been interval decrease of the vasogenic edema within the affected parenchyma. There remains no dilatation of the third and lateral ventricles. A previously demonstrated small area of restricted diffuse and high T2 signal in the lateral right cerebellar hemisphere has resolved. There are no current findings of restricted diffusion to suggest the presence of acute ischemia. The supratentorial brain is unremarkable. Previously demonstrated subgaleal fluid has resolved.
1.Residual tumor within the right cerebellopontine angle has decreased in size now measuring up to 3.5 cm in maximal dimension (previously 4 cm.)2.Enhancement within the skeletonized right internal auditory canal has become more defined and also extends along the operative tract.3.Mass effect upon the adjacent brainstem and right cerebellar hemisphere, with leftward displacement of the vertebrobasilar system as well as partial effacement of the fourth ventricle, has slightly decreased over the interval.