Three months ago I had a 6”+ frontal lobe atypical meningioma removed via craniotomy. Surgery was successful, 100% of visible tumor was removed. I too had a consult with the radiation oncologist. His opinion was basically no opinion; I could have the radiation treatment or not. I have read on this site and other sites of the potential side effects. Because the tumor was in the frontal lobe, there is risk of radiation caused long term permanent damage including cognitive decline, memory loss, and behavioral changes. Your post is encouraging me to take a wait and see approach. If I wait and monitor with periodic MRI and the tumor comes back, it will get treated then hopefully with gamma knife. Based on my age (67) this seems logical. It could take years for the tumor to regrow, in which case I’ll be approaching natural life span anyway. Does this make sense? I’m getting a second opinion from another radiation oncologist, and the next MRI is in July.