Second primary cancers, are not uncommon in oral cancer patents particularly in those that come from tobacco. While in theory they can occur anywhere, they tend to be in the aero digestive tract and the brain. But the overall numbers of them are relatively small. I have never heard of one to the kidney in 14 years except for a good friend of mine that had multiple metastasis (not second primaries) to most of his major organs as he fought, using extreme measures, to stay alive to see his daughter graduate from college (He made it).

Aside from the question, just a comment about how far some people will go and what they will endure.

The 2 years of treatments at the end of his run were brutal. There was nothing that he would not do to make that ceremony. He developed liver cancer and had surgery to remove the impacted part. He developed lung cancer and had radio frequency abalation repeatedly to burn the areas that were appearing on his scans. He developed kidney cancer and had that kidney removed. He finally developed a brain cancer and that was the end. He was a cop, street tough, and when it came to this cancer battle he proved to be the toughest man I have ever known. I would have caved very early in the process�

You may be able to sign up to that site as a new user, for free, to get some limited access. I would try.