The findings highlight the importance of regular monitoring of thyroid function and prompt correction of over- and under-treatment with thyroid hormone to reduce patient harm.

An endocrinologist specializing in thyroid cancer and creator of the Hemoglobin A1c test for diabetes reflects on his career, offering advice for aspiring researchers.

Thyroid disease affects more than 20 million people. Know if you're at risk, signs to look for and what the treatment options are.