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  • Title: A case of malignant thymoma mimicking thyroid carcinoma: a pitfall in fine-needle aspiration.
    Author: Matsuura B, Tokunaga H, Miyake T, Utsunomiya S, Minami H, Onji M.
    Journal: Endocr J; 2004 Apr; 51(2):237-41. PubMed ID: 15118276.
    Abstract:
    A case of malignant thymoma presenting as an anterior neck mass is reported. The tumor extended from the thyroid gland to the superior mediastinum. It did not accumulate Tc-99m pertechnetate, but continued to accumulate Tl-201 at the late phase. A fine-needle aspiration cytology from the tumor showed tight clusters of epithelial cells with crowded ovoid nuclei. The tumor was initially diagnosed as thyroid carcinoma, clinically and cytologically. A thymoma with a dominant epithelial component has to be considered in the differential diagnosis of a suspected papillary carcinoma of the thyroid.
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