My SO has metastasis to his lungs as well. He is beginning a new trial, which is still in Phase 1. It is combining the two drugs Interleukin-21, riL-21 and Anti-PD-1. The Protocol # is CA220-008. WIRB Protocol # 20120892. I am still researching the drugs as this study's purpose is to learn about the safety of the drugs together, which I find frightening. They are recruiting in several states, I can check which ones and get back to you if you are at all interested. Best wishes,