Looking back through all of lab work my HMO DID test my TSH level in the pre treatment phase. My TSH hasn't changed much since then. My oncologist told me that because of IMRT they didn't expect any thyroid problems but they recommend testing every 6 months to be sure. I have had much greater sensitivity to cold then before but I am almost certain that it's a factor of the 30 lbs less insulation I'm packing around. It's been improving. My TSH levels have gone up slightly from 2.3 to 2.6. Now I'm curious what the tolerance range of the test is. I am also wondering if TSH levels, affected by radiation damage, go up over time.