I knew you would be on top of this!

You guys do a great job of working the problem, seeing the right doctors, etc.
Tremors can be from dehydration and related electrolyte imbalances. Also, if the CNS was affected, that can cause tremors as well. For doctors to even say that a spot on the lungs could cause tremors, when it was so obvious that there were electrolyte imbalances . . . well, that's really dumb.
I hope the lung spot isn't cancer! You'll be in my thoughts.

Annie