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자료유형
학술저널
저자정보
Kim Kwangsoon (Department of Surgery College of Medicine The Catholic University of Korea Seoul Korea.) Jung Chan Kwon (Department of Hospital Pathology College of Medicine The Catholic University of Korea Seoul Korea.) Bae Ja Seong (Department of Surgery College of Medicine The Catholic University of Korea Seoul Korea.) Kim Jeong Soo (Department of Surgery College of Medicine The Catholic University of Korea Seoul Korea.)
저널정보
대한갑상선-내분비외과학회 The Journal of Endocrine Surgery The Journal of Endocrine Surgery 제21권 제1호
발행연도
2021.1
수록면
41 - 46 (6page)

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Merkel cell carcinoma (MCC) is an uncommon neuroendocrine cutaneous malignancy. The thyroid gland is an exceptionally rare site of metastasis for MCC. Thus, metastasis to the thyroid gland may entail diagnostic difficulties. An 82-year-old man presented with a palpable neck tumor in the right anterior neck. Computed tomography scan revealed a 3.4 cm, enhancing tumor in the right thyroid gland. The patient underwent fine needle aspiration, and cytologic and immunohistochemical findings revealed metastasis of MCC to thyroid gland. We decided to perform surgical excision of the right thyroid gland. The patient was discharged 2 days after surgery without any complications. Various immunohistochemical studies were performed with the surgical specimen. The tumor cells were positive for CK 20 and CD 56, but negative for thyroid transcription factor-1. Finally, the histopathologic diagnosis confirmed as metastasis of MCC to the thyroid gland. Here, we present an exceedingly rare metastasis of MCC to the thyroid gland and discuss its diagnosis and treatment. In patients with a known history of a primary malignancy, the differential diagnosis of any abnormal findings in the thyroid gland should always include possibility of potential metastasis.

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