Everyone's story is different, so I don't know whether this will be helpful. Some years ago (when I was 60) I had a bump on my skull that caused no symptoms. After I started having fleeting "ice pick" headaches, I decided to have it checked out. It was a fairly large meningioma that had broken through the brain lining. Because I was experiencing symptoms, after consultation with my surgeon, I decided to have surgery. My reasoning was that it would not go away on its own, and might be growing. Because I had symptoms, I decided there was no upside to waiting, and surgery might become riskier over time.

I was quite frightened, but the surgery was successful. Some of the tumor was close to a central blood vessel and could not be safely removed. As a result, the surgery was followed by very intense, directed radiation every day for a week. The whole experience left me a bit tired (and with temporary hair loss), but I recovered and returned to work as a lawyer. Now, after 5 years of post-surgery MRIs, the doctors have determined the remaining tumor is stable, and I am not at increased risk of suffering a stroke.

Best of luck with your decisionmaking and I hope you have a successful outcome!