Does the presence of thrombus in the sinus affect your decision between fractionated radiation and SRS for recurrent grade 1 meningioma?  

The presence of a thrombus in the venous sinuses can be a significant risk factor for post-treatment complications after SRS for meningiomas originating near or attached to the sinuses. Venous sinus thrombosis can be increased by the SRS, leading to venous infarction, which can cause a range of neur...

This is a very interesting question and sheds light on important issues regarding symptomatic edema with meningioma. As Dr. @Stea points out nicely, venous sinus compression or invasion plays a role and must be considered. Another way to view the risks for symptomatic edema is to realize its relatio...