It's frustrating, sucks and makes no sense - all rolled into one.
I hope things go well at the neuro - the current symptoms could be other stuff - like after affects of the chemo/radiation. Both of those are potent and he just finished, last week? His body needs to recover.
However, if he's over at the hospital today, is it possible to see one of his Oncology docs? He does have something going on - dehydration, malnutrition, something systemic from what you're describing. The neuro guy may help, but may not if you present him with the symptoms and it's not of neurological origin.
That's my first gut reaction. Not that it grew through treatment. Keep me posted.
