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J Clin Endocrinol Metab ; 96(9): 2684-91, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21752893

RESUMO

CONTEXT: More than 99% of thyroid cancers arise eutopically within the thyroid gland. The most frequent sites of ectopic thyroid tissue are lingual, sublingual, thyroglossal, laryngotracheal, and lateral cervical. Thyroid tissue can also be found in remote structures that were associated with the thyroid anlage during development, including the esophagus, mediastinum, heart, aorta, adrenal, pancreas, gallbladder, and skin. Ectopic thyroid tissue can be subject to the same pathological processes as normal eutopic thyroid tissue such as inflammation, hyperplasia, and tumorigenesis. The aim of this review is to describe aspects of thyroid cancer arising from the ectopic thyroid tissue in the neck in regard to epidemiology, diagnosis, and treatment and to present an illustrative series of cases of ectopic thyroid cancer. DATA ACQUISITION: We have searched the PubMed database for articles including the keywords "ectopic thyroid cancer" published between January 1, 1960, and January 1, 2011. As references, we used clinical case series, case reports, review articles, and practical guidelines focused on ectopic thyroid cancer confined to the neck region. SYNTHESIS AND CONCLUSIONS: The possibility of an ectopic thyroid cancer should be considered in the differential diagnosis of a pathological mass in the neck. Treatment of ectopic cervical thyroid cancer is based predominantly on the surgical excision of the malignant lesion. Management strategies, including performance of total thyroidectomy, neck dissection, and treatment with radioiodine, should be based on individualized risk stratification.


Assuntos
Carcinoma/patologia , Coristoma/patologia , Neoplasias de Tecidos Moles/patologia , Neoplasias da Glândula Tireoide/patologia , Adulto , Humanos , Masculino , Pessoa de Meia-Idade
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