The more knowledgeable members of the forum might know, but I am wondering if the radiation field and the amount of radiation given are factors in why some patients manage to go through TX without a PEG and others needed it from around the mid-point of TX. John got his PEG the third week of treatment and had to use it starting the fourth week because he could not even manage four sips of coffee. Yet, another gentleman we met at the hospital who was being treated at the same time managed to continue eating till the last day of treatment -- he even had a turkey dinner for Christmas. Irrespective, I believe that determination and whether you have someone to keep on pushing you to eat and drink during treatment are important. During treatment, there are so many other things that need attention that it is easy to "just skip a meal." Cancer is a battle with many fronts, you might need to think about which fronts you want to focus your energy on.