Hi Hasim, as I had mentioned during series of PM few months back, a second opinion would be better as Chemotherapy alone was never a good option for Oral Cancer (as suggested by your chemo doc in Mumbai). Your doctor in Lucknow seems to be more resonable to recommend Radiation for 30 days. None of us here can certainly say that the new lesion is cancer. You should check with doctor if an ultrasound guided FNAC can be performed to confirm.

If it is indeed cancerous, radiation can damage. Again, gold standard is concurrent chemo-radiation, so see if you can get a second opinion as it is never too late.

It is difficult time for you and your dad. All the best for the treatment.