[Papillary carcinoma on thyroglossal duct cyst].

Papillary carcinoma ansing on a thryroglosal duct cyst is a rare tumor. Since Ucherman described first case in 1915, only 150 cases have been reported. We present clinic evolution and treatment of a new case and review literature and discussion about tumor origin, adequate diagnosis test and treatment. This should include Sistrunk procedure but further surgery on thyroid gland is not accepted by all authors.