Your post sounds like what I went through last year. A CT scan (for another complaint) found a mass on my left kidney. My urologist performed a biopsy and it was diagnosed as UTUC (upper tract urothelial carcinoma) which was graded as slow growing and non invasive. I was sent to another urologist who specialized in laser treatments and he did 2 ablations 3 months apart to laser out the tumors. My tumor were in a tricky area it the very top of my ureter and unless the tumor was removed, it would cause problems. I know how hard it is to wait for the diagnosis and treatment plan. Be patient and take a notepad with you to your follow up appointment. ASK QUESTIONS! Don’t let your dr rush you. After your appointment, write down any questions you still have and send them to your doctor. I was lucky to have a dr who answered my emails. Stay focused on your health. Here’s some hope for you….I had a CT scan 2 weeks ago and a cystoscopy last week. NO SIGN of cancer. Of course, I will have to be monitored frequently. But for now, I’m cancer free. I wish the same outcome for you. 🙂