Chetan

Good to hear you are on top of the TSH, but again, demand a copy of the test results for yourself with the actual number. It's good to have in your files.

As for the carotid artery, while I never had any issues, my cardiologist insisted on doing an ultrasound of my carotid on the left side where I had all the radiation and surgery. But this was only after he found out I had radiation twice and since I was his first patient who had over the maximum radiation in the same area, he wanted to be sure. It turned out just fine, with zero blockage. So, IMO, no downside to getting one.

Last but not least: you are too new a member to remember the heated PEG wars on this forum. In retrospect, I was careless with my adjectives which triggered equally fervent opposition.
Bottom line is that oncology doctors are divided on this issue. No surprise that most OCF members advocate exactly what their doctors told them. My CCC doctors all had the same opinion that your RO has: a PEG should not be routine, should not be put in "just in case" and almost all of their patients went through the radiation treatment without a PEG and had no complications or dehyradition. That was my experience also.
However, some doctors are adamant that their patients get a PEG whether they need it or not, and some doctors refuse to treat a patient who does not get a PEG. They stress that it's a simple procedure to put a PEG in.
We all need to trust our doctors, so the OCF members whose doctors are Pegophiles (oops my bad bias) are vocal advocates of getting the PEG. They will regale you with posts about how the PEG was so good and they could not have survived without it. My caregiver wife would have liked me to get a PEG and in that she seems to reflect most caregiver's opinion.
Patients tend to differ however.
IMO There is no right or wrong decision on a PEG. You are not "tougher" if you don't get a PEG, but for many of us there was a deep psychological satisfaction in not letting this cancer take away our swallowing and eating by mouth. It tends to show up mostly in senior alpha males like myself, Michael Douglas, our own DavidCPA Maybe it's all those movie scenes with the feeding tubes on terminal or dying or major injured people, but for me personally, not getting the PEG was the right choice.
so bottom line, I think your RO's position is just fine about "wait and see" on the PEG. Bulk up now. Even with a PEG, people lose weight. I did massive muscle training the three weeks right before I started radiation to bulk up to 177 pounds and I still went down to 140 but since I used to do marathons when I weighed 125 pounds, it was within an acceptable range for me. (I'm 5'11")
Charm