Graves' Disease Support Group
Graves-Basedow disease is a medical disorder that may manifest several different conditions including hyperthyroidism (over activity of thyroid hormone production), infiltrative exophthalmos (protruberance of one or both eyes and associated problems) and infiltrative dermopathy (a skin condition usually of the lower extremities). This disorder is the most common cause of...
My TSH on Monday was 0.99, however, and my FT3 was also very close to the bottom of the range, with FT4 in the middle of the range, and I felt horrid!
"Central hypothyroidism: a rare cause of hypothyroidism where the thyroid gland is normal and the problem is inadequate TSH secretion from the pituitary gland."
I also read an article pointing out that the "Reflex strategy in TSH testing" (namely, the lab will first test for the TSH and then, only if it is abnormal, will test the same blood for FT4) --so the article pointed out that this strategy won't detect subclinical central hypothyroidism.