Certainly if he were "just" dealing with
HPV+ SCC, Tonsil Primary with local mets his treatment plan is well established and his expected recovery is more predictable but my concern, like yours, is the distant mets.
What do his docs say the chances are of killing the distant mets?
Where is he being treated?
What chemo are they using?
Did they do a biopsy of the lung nodes?
When did he start chemo?
What do they plan to do after the 3rd chemo, i.e., what will tell them to do the radiation part?
Hoping for the best.