Hi Eshwar,
I responded to your PM but now have a clearer picture of what is happening with your Dad. I had my second round of radiation in late 2009 and had a similar treatment plan to what your father had 1st time around - Radiotherapy twice a day for 3 weeks with weekends off. I do have permanent issues with almost no saliva and difficulty eating, speaking and swallowing. I initially had a naso-gastric tube put in during my last week of treatment but 5 months later was given PEG which is now permanent. Despite this I consider the treatment to have been a success - the mets to my neck, which were reduced in size surgically prior to treatment, were completely killed off with the radiation. I have a good quality of life and travel and get enjoyment out of simple pleasures everyday. (My speaking issues are not related to the two rounds of Radiotherapy - that is the cumulative result of several partial glossectomies, a tissue transplant and two partial mandibulectomies and related teeth removal) Good luck to you and your father!