[Thyroid teratomas in the adult].

Thyroid teratomas are rare neoplasms in adults (only 19 cases have been reported in the world literature). We report the case of a 55-year-old woman with a paratracheal mass, paralysis of the recurrent nerve, dyspnea, and results of palpation suggestive of malignancy. Total thyroidectomy was performed and anatomopathological study disclosed a benign thyroid teratoma in adult. We discuss this case and review the literature on adult thyroid teratomas.