RCC stage 4. Tumor in last remaining kidney

Hi all. I posted here maybe five months ago when I was just in the process of gathering information about a recurrence of RCC, after 4 years of clear scans on follow up. This is an update. 

As a recap, a pulmonary node and lymph node showed up in my lungs via a CT scan for my heart in December, flagged as RCC. I was referred to a pulmonologist who did a bronchoscopy. Right after performing the procedure he then left on vacation for a month with instructions for my family doctor to a) if results come back as malignant send me to oncologist or b) if not we will follow up when I get back. 

The bronchoscopy was done in February and it was inconclusive so I waited for a month to see him again. When I did, a CT scan was scheduled for April to see if the node and lymph node had progressed. It had, and was again flagged as RCC, almost definitively this time based on the growth of both the pulmonary node and the lymph node.

I was put in contact with Dr. Kollmansberger from Vancouver , who is an expert in RCC. I am on Vancouver Island and I got a referrel to him. I have seen him once, and meet with him again this Tuesday (tomorrow).

Last week I had a core sample of the lung node taken, as well as a full body CT scan with contrast. 

I have since gotten the CT results from last week's scan from my family doctor and it had a big surprise on it. There was a 4.9 x 4.1 x 3.8 enhancing renal mass in the upper pole of my right kidney. It was compared to the scans from December and April, mentioning this tumour was previously measured 4 x 3.8 x 3.5.

I am mystified how this had not been caught on previous scans. This is the first I was informed of this tumor even though it was obviously there in the previous scans. To me there was a failure of the system at some point. Since I have had my left kidney removed, I know this is a grave development, and the sooner it was discovered the more kidney they may have been able to save. 

So that is where I am at, and I will come back and give an update once I talk to Dr. Kollmansberger. He has been talking to my cardiologist because I have aortic stenosis as well, and they are looking at replacing my aortic valve (seeing surgeon on June 13 to discuss). At 47 years old, things are coming at me fast and furious right now, to say the least.

If you are wondering how this could happen, one theory is that the year of chemo and six months of radiation I had as a teenager for Hodgkins Disease in the 80s has caught up to me. 

Sorry for the long post, but I really want to know if anyone on the forum has had a tumor in their remaining kidney and what they did to treat it? Thanks so much.