Hi again Mat52
When you say your other autoantibodies were negative I'm guessing that included adrenal autoantibodies which they probably would have tested because of the Hashimoto's. How long ago were they tested and how long have you had Hashimoto's?

Have you ever been given any information about APS? (Autoimmune Polyglandular Syndromes). This is when other autoimmune conditions develop after an original autoimmune disease.

Here's a link specifically related to Hashimoto's which may help you understand:

http://www.thyroid.org/wp-content/up...v238_14_15.pdf

Although the article is about a study to do with the prevalence of Addison's Disease with Hashimoto's there is info in the "Results" section about other conditions associated with Hashimoto's. The commentary is also interesting and may help you to present another medical opinion for your doctors to consider.