Thyroid dysgenesis
Malformation or misplacement of the thyroid
Thyroid dysgenesis is a cause of congenital hypothyroidism where the thyroid is missing (thyroid agenesis), ectopic, or severely underdeveloped. It should not be confused with iodine deficiency, or with other forms of congenital hypothyroidism, such as thyroid dyshormonogenesis, where the thyroid is present but not functioning correctly.