@avawein I want to connect you with @millis who shared that they had regrowth as well in this comment: https://connect.mayoclinic.org/discussion/frustrated-could-i-have-small-fiber-neuropathy/?pg=1#comment-604361

I also found this and thought you may find it valuable.

- Thyroid tissue remnants after "total thyroidectomy":
https://pubmed.ncbi.nlm.nih.gov/19735611/
Despite their skepticism, did they share what it could mean for you?