just posting this so i can find it again .
msdmanuals.com/en-gb/profes... MSD manuals/ professional/endocrine-and-metabolic-disorders/thyroid-disorders/overview-of-thyroid-function .
Contains some very useful subsections on the various different forms of thyroiditis, hyperthyroidism, hypothyroidism, nodules , and cancers.
I found it pretty useful (as long as you can ignore the usual guff about low TSH / subclinical hypo in patients on Levo)