I has promised myself, and others, to stay out of this one. Like Brian said, the nodes are never the primary site. If it were me, I would go with he more conventional radiation protocols and appropriate radiation enhancing chemo. As you have done, reach out for people on here that also had unknown primary tumors, they(the members) do exist. Hit it everywhere they normally treat Tonsil/base of tongue/nodule cancer with. They may, while under sedation, want to conduct a more invasive biopsy of the tongue/tonsil areas. You needed, and seem to have gotten, a complete chest and abdomen work-up to rule out the rare lung to neck metastases and maybe a quick brian MRI. They are really on track. They should always should treat all the suspect areas, and don't worry, he could come through fine. There will be side effects, but they can and have been very manageable. If you read some of theses posts, you are left with only a few people that have made it thought the treatments, not true. Many of them believe they have and have not, chosen not to say. Good luck, with what seems to be the appropriate treatment plan.

Glenn