In people with hypothyroidism that is being treated with thyroid hormones and that are not showing symptoms or hypothyroidism, how often should these tests be performed:
- TSH blood test
- T4 blood test
- ultrasound of the thyroid
- scintigraphy of the thyroid
(if at all, of course)
If the cause of the hypothyroidism matters, let's say Hashimoto thyroiditis.