Linfoma Primário de Tireoide Mimetizando Carcinoma Anaplásico / Primary Thyroid Lymphoma Mimicking Anaplastic Carcinoma

Introdução: o linfoma primário de tireoide é uma neoplasia rara, agressiva, cuja manifestação pode assemelhar-se ao carcinoma anaplásico. Relato do caso: descreveu-se o caso de uma paciente de 59 anos com crescimento de massa cervical anterior volumosa em um mês associada à disfonia. Tomografia computadorizada revelou aumento da tireoide com traqueia desviada e linfonodomegalia. Histopatológico confirmou linfoma difuso de grandes células B de alto grau. Paciente foi, celeremente, submetida à terapia e obteve boa resposta. Conclusão: em pacientes com rápido crescimento de massa em topografia tireóidea, a hipótese de linfoma deve ser elencada, sendo primordial diagnóstico precoce e conduta agressiva.

Introduction: primary thyroid lymphoma is a rare, aggressive neoplasm, whose manifestation may resemble anaplastic carcinoma. Case report: a 59-year-old patient with an increasing anterior cervical mass in one month, associated with dysphonia. Computed tomography revealed enlargement of the thyroid with tracheal deviation and lymph node enlargement. Histopathology confirmed diffuse high-grade large B-cell lymphoma. The patient was promptly submitted to therapy and obtained a good response. Conclusion: in patients with sudden mass growth in thyroid topography, the hypothesis of lymphoma should be considered, with rapid diagnosis and aggressive conduct being essential.

Intraosseous mucoepidermoid carcinoma

Mucoepidermoid carcinoma (MEC) is a common malignant tumor composed of mucinous cells, clear cells and squamoid tumor cells. It is usually localized on the salivary glands, however can very rarely be intraosseous. This tumor affects women more than men and is more common in the mandible. In this report, we present a case of a 45-year-old woman with a painless intraoral mass for 10 years which was repeatedly misdiagnosed, evolving into an extensive lesion. After an appropriate approach, she was diagnosed with MEC of the mandible and submitted to a left hemimandibulectomy accompanied by microsurgical reconstruction with excellent results.