I am one of those odd cases. The largest dimension of my tumor was about 4.4cm, it was a little larger than a golf ball. I had serious compression of the brain stem. By the time I realized I had a problem, followed by an MRI, and diagnosis, I was told I had to three to six months or face coma and possible death. I had 32 hour surgery (yes, that is wayyyy unusual) in which they were able to remove up to 95% of a tumor well connected to the artery. I spent six days on a breathing machine and another week in ICU. I went home, rather than into rehab as some doctors wished, and spent the next 10 weeks getting better. I did suffer from paralyzed vocal cord and swallowing difficulties. Like you, public speaking is a big part of my job, so when I did go back to work, it wasn't easy, or pretty. But it all worked out with a series of injections and as we were about to schedule a surgical implant a year later, I had enough improvement to say "No, thanks."
The tumor demonstrated new growth 18 months after surgery, so we embarked on 28 sessions of FSR.
Close to four years later, I am, and have been continuously, pretty awesome. My voice is almost normal. My swallowing difficulties are real, but essentially minor.
Lots of people here have had big tumors and kind of cruised on through. In fact, some of those that have had the greatest challenges had very small tumors.
Life is good.