Case report observes papillary thyroid carcinoma in ectopic thyroid tissue within thyroglossal duct cyst, highlighting rare cancer risk.
Thyroglossal duct cysts are an embryological remnant found in 7% of the population, typically in the midline neck 1 . The thyroglossal duct cyst wall can include ectopic thyroid tissue, 2 which may develop papillary thyroid carcinoma in less than 1% of cases. 1
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Riordan et al. (2026) studied this question.
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