I had Stage 1B Clear cell renal cell carcinoma diagnosed on 4/12/12 when I started having VERY bloody urine one night at work! I had a tumor the size of a baseball on my right kidney, I had it removed two weeks later, which happened to be my son's 8th birthday! I didn't need any further treatment since my lymph nodes and surgical margins were clear.
My PCP sent me to a nephrologist. He told me that I didn't need to worry about my protein intake. He also put me on a blood pressure medication to help protect the remaining kidney from the increased blood flow. I've been following up with the Urological surgeon every 6 months. I had an ultrasound in January of my remaining kidney and of the spot where my right kidney used to be and everything was fine. I also recently had a partial thyroidectomy but that wasn't cancerous. I will see the renal doctor again in July. Was supposed to see him in April but due to my surgery I had to reschedule..
If you haven't seen a kidney doctor, I'd highly recommend it. The urological surgeon didn't seem to have a problem with it. Good luck to you!