Teratoma benigno de tireoide em criança de 5 anos: relato de caso

Objetivo: Relatar um caso de teratoma de tireoide e destacar que, apesar de raro, deve ser incluido no diagnostico diferencial das massas cervicais. Descricao: Teratomas sao neoplasias derivadas das celulas germinativas com componentes dos tres folhetos embrionarios: ectoderma, endoderma e mesoderma. Ocorrem mais frequentemente nas gonadas, regiao sacrococcigea, mediastino e regiao pineal. Teratomas de tireoide sao neoplasias raras, geralmente de carater benigno, mas que se nao tratados precocemente podem evoluir com insuficiencia respiratoria devido ao efeito de massa do tumor. Conclusoes: Apesar de raro, o teratoma de tireoide deve ser incluido no diagnostico diferencial das massas cervicais, pois evolui para obito em 80% dos casos nao tratados precocemente. Objective: To report a case of teratoma of the thyroid and stress that, although rare, should be included in the differential diagnosis of neck masses. Description: Teratomas are neoplasms derived from germ cells with components of the three germ layers: ectoderm, endoderm and mesomesoderm. Occur more frequently in the gonads, sacrococcygeal region, mediastinum and pineal region. Thyroid teratomas are rare neoplasms, usually benign, but if not treated promptly can develop respiratory failure due to tumor mass effect. Conclusions: Although rare, thyroid teratoma should be included in the differential diagnosis of neck masses, because evolved to death in 80% of cases not treated early.