My doctors believe I'm having a recurrence of papillary thyroid cancer. I had a fairly large tumor that was unencapsulated, numerous lymph nodes involved, spread to the perithyroidal soft tissue and trying to get at my muscle. I had 155 mCi of i-131.
My Thyrogen stimulated Tg came back 2.1 ng/mL, so detectable, and it's been <.2 ng/mL for the last 3 1/2 years. My last unstimulated Tg in Jan. was <.2 ng/mL, I have no antibodies. I will repeat the unstimulated Tg next month.
Nothing was seen on a neck CT or ultrasound. A possibly calcified lymph node had a FNAB done with Tg washout and both were negative.
I am planning a withdrawal WBS soon and we'll see if 1. the Tg is higher and 2. something shows on the WBS.
So, how often is something found on a withdrawal WBS that cannot be seen with CT or US?