@seag47 – I believe that meningiomas and other tumors that show up on the falx cerebri can be removed without causing problems. I know that my grandmother had a tumor in this region, and it was successfully removed.
The doctor had told her that she might have to have radiation therapy, but that was only if he were unable to remove all of it. He didn't know whether or not he could get it all until he was actually inside her skull.
We were so glad that she didn't need radiation. Getting the entire tumor removed is so much better than having treatments every day for a month that may or may not work.