Low tsh

[vennboys]

Hi, new labs to report. tsh now 0.03 so remain low. Free t4 and free t3 reported as normal, don't know the ranges as they didn't say. I'm scheduled for a I-123 uptake test I guess to check my thyroid. Since my t4 and t3 are normal is that still significant for pituitary issues?

Thanks for the help,
vennboys

[rumpled]

Hard to tell - you have not had enough testing!

[vennboys]

No other tests as of yet. I thought that a low tsh was significant for a pituitary issue also, but my endo wants to go this route first. I'm betting that this I 123 will be normal and then I am pushing for either an mri or more labs to check other pituitary hormones.
What do you think? Is is possible that it could be a thyroid issue?

TAmmy

[rumpled]

A TSH that low appears more pituitary (central) hypothyroidism than just plain ol' hypo. But I would get a copy - I find that sometimes when they say things are normal, well, sometimes, they are not. Best to check.
Are there any other tests that indicate other pituitary issues?