Non small cell at base of tongue???? interesting normally its squamous cell - I would ask them to double check that. I've read the small cell lung cancer can move up into the base of tongue area but that's very rare, are they saying this is a primary or lung mets? Assuming its non small cell that would imply non small cell lung cancer as well.
Regardless I would look for treatment at a CCC - why? Because they do cancer all day every day, and your husbands cancer if it is not squamous cell carcinoma and is in fact non small cell lung mets - is unusual in its location this would be another reason to be seen at a CCC (if possible) - and it should probably be a lung cancer specialist - not ENT because I believe lung cancers are first off - treated with chemo primarily (my mom died of lung cancer - her treatment was chemo, and then a few rad sessions to the head to hopefully zap any cells at may have migrated) and secondly treating it as a base of tongue would do nothing to solve the actual problem (lung cancer mets)

It is possible its squamous cell carcinoma - in which case you are in the right place - welcome - sorry you have to be here, hugs