Hi @jordana9110 and welcome to Mayo Clinic Connect.

I am not medically trained and don’t know much. You don’t mention how high your thyroglobulin is or why your doctor wanted to follow-up and test it. It does sound like it is something your doctor thinks needs exploring related to your thyroid gland.

What prompted you to get bloodwork done, maybe routine or were you having symptoms? You mention your thyroid is high. What specifically? What is next?