Causes of cysts on the thyroid gland include a family history of thyroid nodules, iodine deficiency and thyroid cancer, according to Cleveland Clinic. Thyroid cancer is a rare cause of thyroid cysts and is found in less ... More »

The underlying cause of a growth in thyroid tissue, the source of thyroid nodules, of which a thyroid cyst is a variety, is unknown, explains Cleveland Clinic. However, degenerating thyroid adenomas are the most common c... More »

A thyroid cyst is a type of thyroid nodule filled or partially filled with fluid, according to Cleveland Clinic. Cysts form inside the thyroid gland. More »

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The purpose of thyroid surgery is to remove all or part of the thyroid gland to treat thyroid nodules, hyperthyroidism or thyroid cancer, according to WebMD. It may also be performed to take a tissue sample to check for ... More »

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Many conditions can cause the development of nodules in the thyroid gland, including iodine deficiency, overgrowth of thyroid tissue, cysts, inflammation of the thyroid and the development of a goiter, according to Mayo ... More »

Mayo Clinic notes that a thyroid can become enlarged due to iodine deficiency, Graves’ disease, Hashimoto's disease, inflammation, pregnancy, multinodular goiter, thyroid cancer or solitary thyroid nodules. The American ... More »

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The difference between a thyroid cystic mass, also know as a thyroid cyst, and complex thyroid nodules is that thyroid cysts are liquid-filled sacs, while nodules can be solid lumps. Cysts and nodules do not necessarily ... More »