Table 1 broadly categorizes the disorders of the thyroid gland based on new tissue growth (neoplasms), autoimmune mechanisms, and levels of hormone production.
Table 1. Thyroid Gland Disorders. | Neoplasms | Autoimmunity | Insufficiency | Hyperproduction |
| Thyroid cancer | Graves' Disease | Primary hypothyroidism (thyroid) | Primary hyperthyroidism (thyroid) |
| Goiter | Hashimoto's Thyroiditis | Secondary hypothyroidism (pituitary) | Secondary hyperthyroidism (pituitary) |
| Nodules | Other autoimmune disorders | Tertiary hypothyroidism (hypothalamus) - rare | Tertiary hyperthyroidism (hypothalamus) - extremely rare |
