Hypersecretion of calcitonin or thyrocalcitonin

Congenital (dyshormonogenic) goiter

Goiter due to enzyme defect in synthesis of thyroid hormone

Goitrous cretinism (sporadic)

Abnormality of thyroid-binding globulin

Atrophy of thyroid

Hyper-TBG-nemia

Hypo-TBG-nemia