I had a thyroidectemy in January 2010. It was after that surgery that they found it was cancer. The docs wanted me to follow up with radiation which I didn't do bc they said they probably got it all. I'm currently taking 100mcg of synthriod. I just got a call from dr office and my TSH level is 16.1, I'm waiting on them to call back bc I assume they will be upping my dosage. I'm worried that this is a sign my cancer has returned. If anybody has any insight on this please let me know, I'm worried. I was thinking of maybe making an appt with an endo since they would be able to treat me better. I pray it's not cancer.