goiter is defined as an abnormal enlargement of the thyroid gland caused by a variety of factors. The most common cause of goiter worldwide is a lack of iodine in the diet. Treatment depends on the size of the thyroid, the symptoms, and the cause of the enlarged thyroid. Moderately enlarged thyroids that are not noticeable and do not cause problems usually do not require treatment.

Multinodular goiter (also known as multinodular goiter) is defined as an enlarged thyroid gland with multiple thyroid nodules with thyroid function that may be normal, decreased, or increased.