Medically reviewed by Isabel Casimiro, MD, PhD Thyroid nodules are lumps (growths) made up of abnormal cell clusters that ...

represent 15 to 37 percent of all surgical excised thyroid nodules. [1 5] CTNs include true or simple thyroid cysts, with an epithelial lining, and mixed nodules with a predominantly fluid component.

Thyroid nodules develop when thyroid cells build up in the thyroid gland. Some people will discover a cyst by feeling it in their neck; however, most people will not know they have a thyroid ...

Thyroid nodules were classified as CTN if the fluid ... repeated twice because of inadequate specimens or refilling of the cyst after aspiration; in three patients it was repeated three times.