Meningioma status post laser ablation on 6/30/2016. There is slight interval decrease in size of a nodular component petroclival dural-based mass that projects into the left pons, where laser ablation had been performed. There is resultant mildly diminished mass effect upon the pons. However, there is now more confluent enhancement of the treated portion of the tumor. Nevertheless, there is diffuse vasogenic edema within the brainstem and left cerebellar hemisphere. The rest of the tumor, including the portion that extends into the left cavernous sinus is unchanged. There are postoperative findings related to prior left temporal craniotomy with encephalomalacia in the left anterior temporal lobe and left retrosigmoid craniotomy with left cerebellar hemisphere and left pons encephalomalacia. There is a right transfrontal ventricular catheter. The ventricles are unchanged in size and configuration. There is no evidence of acute territorial infarction.
Slight interval decrease in size of a nodular component petroclival dural-based mass that projects into the left pons, where laser ablation had been performed. However, there is now more confluent enhancement of the treated portion of the tumor. In addition, there is diffuse vasogenic edema within the brainstem and left cerebellar hemisphere.