Re: No Thyroid - Extremely Low Tsh Levels - What Could Be The Cause?
What meds are you taking to replace the lost thyroid?
No it's not a low TSH associated with a thyroid working too hard. The low TSH would most likely arise from too much T3/T4 feedback to the pituitary. When the pituitary detects too much hormone in the blood, it stops producing TSH to try to tell the thyroid to stop producing. With no thyroid to speak to, it rules out the thyroid as the culprit of the source of excess hormone production.
Now, there are some cancer patients on this board and I hope they correct me if I'm wrong, but I do believe that following surgery for cancer, the idea is to supress the TSH level with the meds to prevent recurrence.
I think you're supposed to have low TSH as part of the treatment.
Take care and good luck,