Primary hypothyroidism |
Chronic autoimmune thyroiditis |
Iatrogenic
|
Iodine deficiency or excess |
Drugs - thionamides, lithium, amiodarone, interferon alfa, interleukin 2, tyrosine kinase inhibitors, checkpoint inhibitor immunotherapy |
Infiltrative diseases - fibrous thyroiditis, hemochromatosis, sarcoidosis |
Transient hypothyroidism
|
Congenital thyroid agenesis, dysgenesis, or defects in hormone synthesis |
Central hypothyroidism |
TSH deficiency |
TRH deficiency |
Generalized thyroid hormone resistance (some patients)* |
TRH: thyrotropin-releasing hormone; TSH: thyroid-stimulating hormone.
* Refer to UpToDate content on clinical features of thyroid hormone resistance.