Female, 47 years old, status post resection of a large acoustic neuroma in April, 2015, 6 months status post SRS for residual tumor at Swedish Covenant in September, 2015. IACs:Redemonstrated are findings related to prior translabyrinthine resection of a left IAC and CP angle schwannoma. Residual enhancing tumor remains evident within the left cerebellar pontine angle cistern and skeletonized IAC. The lesion measures 26 mm TV, 14 mm AP and 17 mm CC (previously 32 x 15 x 20 mm). The tumor itself is more heterogeneously enhancing than previously. Mass effect upon the adjacent pons and middle cerebellar peduncle with mild parenchymal T2 hyperintensity has not significantly changed.Brain:No other specific intracranial lesions are seen. Brain parenchymal morphology and signal characteristics are otherwise unremarkable. No other pathologic intracranial enhancement is detected. No intracranial hemorrhage or any abnormal extra-axial fluid collection is detected. The ventricular system is normal in size and morphology.
1.Slight interval decrease in the size of the residual left IAC/CP angle schwannoma. Progressive heterogeneity of tumor enhancement may also reflect a treatment related effect.2.Otherwise unremarkable evaluation of the brain.