what is it caused by?
The most common cause for goitre is iodine deficiency, commonly seen in countries that scarcely use iodized salt.
Goitre
 the most common cause for goitre is iodine deficiency, commonly seen in countries that scarcely use iodized salt. 
ct is produced by which cells of the thyroid gland UNANSWERABLE where is the gland located? The thyroid is located at the front of the neck, below the Adam's apple. does it produce any hormone? Yes, The thyroid gland secretes three hormones: the two thyroid hormones – triiodothyronine (T) and thyroxine (T) – and a peptide hormone, calcitonin. what is the first one about? It  is a thyroid hormone. It affects almost every physiological process in the body, including growth and development, metabolism, body temperature, and heart rate. does the impairment of this gland cause any disease? Yes, goitre what signs does it show? A visible enlargement of the thyroid gland at the base of the neck. what are it's different forms? A goitre may be classified either as nodular or diffuse. Nodular goitres are either of one nodule (uninodular) or of multiple nodules (multinodular). how is it diagnosed? Goitre may be diagnosed via a thyroid function test in an individual suspected of having it. can it be treated? Yes,  If the thyroid gland is producing an excess of thyroid hormones (T3 and T4), radioactive iodine is given to the patient to shrink the gland. If goitre is caused by iodine deficiency, small doses of iodide in the form of Lugol's iodine or KI solution are given.
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Goitre [SEP] Causes
Worldwide, the most common cause for goitre is iodine deficiency, commonly seen in countries that scarcely use iodized salt. Selenium deficiency is also considered a contributing factor. In countries that use iodized salt, Hashimoto's thyroiditis is the most common cause. Goitre can also result from cyanide poisoning; this is particularly common in tropical countries where people eat the cyanide-rich cassava root as the staple food.