Oesophageal cancer -4cycles of chemo done-

Don't know what I'm wanting really - info I suppose

Husband aged 56 Stage 2 T2, N0, M 0 diagnosed July 29th.

just completed 4 cycles of pre op FLOT. Considering how nuclear it is he has done extremely well.

His symptoms (occasional food clogging) completely disappeared after the 2 nd cycle, so much so he ate, wolfed down, a bacon and sausage bap .

what I would like info on is -:

Is this a usual response? Good/bad/predictable?
if that is a good response, why is surgery still necessary( Review PET in 2 weeks)

I heard (as you do) that FLOT only 'stuns' the tumour, not kill it- what is the case?

Any info gratefully received- ta