[Follicular carcinoma of the ectopic lingual thyroid].

The ways of origin and the methods of diagnosing of the ectopic thyroid gland have been described. The authors have shown the case of follicular carcinoma of ectopic lingual thyroid gland in 35 years woman. The effective surgery (labiomandibuloglossotomy and total extirpation of the tumor) and following irradiation therapy with 131I haven't revealed recurrence of the disease during 2.5 years observation. The permanent substitution therapy with thyroxine has secured the euthyreotic state for the patient.