hi there tryherd, I'm not familiar with a cyst component, but by the sound of it, I think a tumor is more solid & a cyst is encapsulated with fluid.
Your tumor is large, so surgery it is. I was really sick post op, felt like I was hit by a mack truck: vomiting, severe headache, others have a smooth recovery, it's all individual.
You will be very fatigued for ~ 2 months + imbalance, it takes weeks to months to re-learn your balance; again, everyone is individual, so you'll see
what issues you have to deal with. Most of us have trouble adjusting to grocery stores, malls, etc - it's all the people coming at you causing you to lose your balance.
After all is said & done, you will recover, adjust, & best of all, you'll feel well again & life goes on ! !
Any questions you have, we are all here to help.
Always good thoughts, Nancy