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Ultrasonography. 2014 Oct;33(4):298-302. English. Case Report.
Kim EH , Kim JY , Kim TJ .
Department of Radiology, Yeouido St. Mary's hospital, The Catholic University College of Medicine, Seoul, Korea.
Department of Pathology, Yeouido St. Mary's Hospital, The Catholic University College of Medicine, Seoul, Korea.

We report two cases of aggressive thyroid lymphoma in elderly patients that presented as Epub ahead of print large infiltrative thyroid masses with extensive invasion to adjacent structures including trachea, esophagus, and common carotid artery. Ultrasonography displayed irregular shaped, heterogeneous hypoechoic mass, mimicking anaplastic carcinoma. Computed tomography showed heterogeneously enhancing mass compared to surrounding muscles without calcification and hemorrhage. After biopsy, the masses were histopathologically diagnosed as lymphoma. Aggressive primary thyroid lymphoma is rare; therefore, here we report its image features, with emphasis on ultrasonographic findings, and discuss its differential diagnosis.

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