I have just gone through this same process over the past four months. A 4 cm mass was found in September. I had radical nephrectomy (entire kidney removed) on January 12, 2024. They found out it was a benign tumor. I am fortunate that I am doing well, but I am minus one kidney. I was evaluated by three Urologists and the size of growth seems to be the most important. Everyone is different, ask questions and come to your own conclusions and be committed to your own decision. After the fact, I should have done what they call “active surveillance” and watch this growth to see if it grows or causes concern. I was also a “wreck” for three months. However, with help from my physician, friends, this web site and my family I am recovering very well. My suggestion, Change your state by keeping active and helping others. You will be better, you will come through this with a few bumps, but stronger in mind, body and spirit. All the best to you, all the time. Blessings.
Doug