Cretinism is a result of loss of function of this gland, an enlargement of which is goiter.
A cancer that affects this structure is characterized by optically clear nuclei of neoplastic cells that are referred to as "Orphan Annie eyes." Located on the ventral surface of the trachea, this structure is damaged in an autoimmune disease named for Hashimoto. This structure secretes one hormone that lowers blood calcium levels and two iodine-containing hormones. Cretinism is a result of loss of function of this gland, an enlargement of which is goiter. For 10 points, name this gland that secretes calcitonin and T3 and T4, which are known as tri-iodo-thyronine and thyroxine.
A cancer that affects this structure is characterized by optically clear nuclei of neoplastic cells that are referred to as "Orphan Annie eyes.
{thyroid} gland