We have been tremendously blessed to have a great team of doctors helping us through this. My husband had none of the typical symptoms of RCC. He had gotten the flu in mid-January that lasted for 2 weeks which resulted in a little cough (nothing major) that wouldn't go away.
From September of 2008 to December, our Primary Doctor had been monitoring a couple of things (an elevated blood sugar count and a worsening anemia discovered at his annual checkup, things my husband had never had). Anyway, he told him to shed some weight and increase his exercise. We were scheduled for a follow-up on April 6. When my hubby got sick in January the weight began falling off of him and it was clear he was severely anemic.
We were scheduled for a couple of vacations and our children insisted we go to the doctor before we left so we did. He ordered a chest x-ray because of the lingering cough and obvious weight loss (about 20 years ago, my husband had unknowingly been exposed to asbestos in his work environment and that went on for several years).
The Chest X-ray revealed 2 small tumors in the upper portion of his left lung. The PCP ordered a CT Scan which revealed tumors in the Right Lung and also the top of the tumor on the kidney...when they saw this they went ahead and scanned down further to reveal the entire pelvic region.
Our PCP called us in and was able to get us into a Urologist immediately. He ordered the Bone Scan and scheduled us to meet with an Oncologist. The Oncologist is the one who ordered the PET Scan and and MRI. It's all about what insurance deems as necessary!
These tests are very costly and you have to have the orders from the right doctors so that your insurance will pay the largest portion of the cost.
I don't know how big the tumor on your kidney is however, from our experience, you would be wise to get an Oncologist (again, preferably an Urologic Oncologist) ASAP. As long as that primary tumor is in your body it can, and will, spread.
If your insurance requires you to have a referral, get one, but do your research and make sure you get a Doctor in your area that has some experience with RCC.
Here's another site that I first found which help us understand the importance of getting things moving:
http://www.myhusbandskidneycancer.com/