A 59-year-old woman had a submental mass for 9 years. Surgical resection revealed a solid rounded tumor, 6 cm in diameter, connected with a cyst of the thyroglossal duct. The histological examination showed a non-obliterated thyroglossal duct with cystic dilation and a papillary thyroid carcinoma. This is the 20th case of carcinoma in a thyroglossal remnant described in the literature.
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