This patient support community is for discussions relating to thyroid issues, goiter, Graves disease, Hashimoto's Thyroiditis, Human Growth Hormone (HGH), hyperthyroid, hypothyroid, metabolism, pituitary gland, cancers, thyroiditis, and thyroid Stimulating Hormone (TSH).
If the older tests are the third generation tests, that may have been the "new best test" at the time.
Both terms are still used today, but there is only the third generation test being used. It is normally called a TSH test.