disease has basis in dysfunction of hyperthyroidism primary hyperthyroidism https://github.com/monarch-initiative/mondo/issues/9759 MEDGEN:811409 A form of hyperthyroidism caused by overproduction of thyroid hormones (T3 and T4) due to pathology within the thyroid gland itself. Primary hyperthyroidism is characterized by low TSH levels and elevated T3/T4 levels. MONDO:1060200 UMLS:C3714618 thyroid gland