It is tricky to answer your question without a certain amount of family and personal history known. Goiter is a commonly caused condition that is a direct result of the non functionality of the thyroid gland. An overactive or underactive thyroid gland can both result in the formation of a goiter. This is the reason it is becomes extremely difficult to answer your question. In a way, the answer to the first part of your question would be that yes, the deficiency of the thyroid hormone T3 can be the cause of a goiter. However, under most normal conditions, this is not a fatal condition. Basically, a deficiency or malfunctioning of the thyroid gland is not a fatal condition under the worst circumstances. However, like all other diseases, no matter how mild or strong in nature, if left neglected, this disease can go out of control too. The chances are higher than you will suffer more from goiter than really lose your life to it. In some rare cases, goiter can also turn cancerous. There is no specific reason fro this problem, any more than there is a logical reason fro people developing cancer unexpectedly, even when they do not have a family history or the disease is not present in their heredity anywhere.
If you are suffering from a deficiency of thyroid hormone T3, then you should be aware that there is nothing incurable about this problem. It can be taken care of quite easily by correcting your intake of the absent hormone. The medications available are not going to be over the counter, so you may end up having to consult with a doctor and getting a prescription for them. If your thyroid gland is making excessively small amounts of the hormone, then you can also opt for surgical removal or alteration of the same. However, this procedure is not something that can be recommended on a website and followed. You will have to consult with an endocrinologist for this. You will be told to increase your intake of iodine, as this is helpful in the normal functioning of the thyroid gland. Among the natural food sources of iodine are all sorts of sea food, shell fish, sea kelp and seaweed, cow's milk and yogurt. You should also make a switch to iodized salt instead of regular salt. It is not enough to take a diet that is rich in iodine. You will also have to take medication.
answered by G R