Re: hasimoto's question?
The endo who diagnosed my Hashi's begins treatment based on the presence of antibodies accompanied by symptoms, no matter what TSH is. The newest thinking is that the gland is doomed to eventual total failure anyway, and starting treatment before then can alleviate symptoms and possibly prevent the formation of a goiter... or prevent greater enlargement of a goiter if one is already present. Waiting until blood tests are out of range can take years, and patients suffer mightily during the meantime. No sense in waiting.