Carcinoma arising in a thyroglossal duct cyst (TDC) is rare. To the best of our knowledge, 155 cases have been reported, 12 of which were studied with CT. The diagnosis is established after surgical excision of the lesion but CT findings may raise the suspicion of malignancy. We present a case of TDC carcinoma and a review of the literature, with emphasis on CT findings.
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