@am1974 Relax, deep breaths. I agree that it is concerning, and nerve-wracking! You feel like you are stuck between believing what your doctor told you, and reading all the not-so-good things your internet research dug up, right?

I have had renal lesions before. The last one on my right kidney, was followed for over a year with periodic ultrasounds and clinical exams. My urologist had flippantly told me, "well, when you start dialysis, we'll just go in and take that kidney out"! After a year+ he determined that it was of no concern for RCC because the images were not showing it to be classical RCC in its presentation.

Please let us know what the MRI results are. And remember, there may be different radiologists reading the images, so their opinions may vary a bit. As @lbrockme mentioned, write down your questions to be sure you are getting them all addressed. And have a calming cup of tea....
Ginger