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Thyroglossal Duct Cysts
A fluid-filled sac present at birth in the midline of the neck. A thyroglossal cyst is
a congenital malformation (a birth defect). It results from incomplete closure of a
segment of the thyroglossal duct, a tube-like structure that normally closes as the embryo
develops. Also called a thyroglossal duct cyst or a thyrolingual cyst. |