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Metastatic clear cell renal cell carcinoma to the thyroid gland: A clinico-pathological and immunohistochemical study of 8 cases and review of the literature / Carcinoma de células renales tipo células claras metastásico al tiroides: un estudio clínico-patológico e inmunohistoquímico de 8 casos con revisión de la literatura

Rev. esp. patol; 52(2): 81-86, abr.-jun. 2019. ilus, tab
Artigo em Inglês | IBECS-Express | ID: ibc-ET1-2186
When a patient with a previous history of neoplasm presents with a thyroid lesion, the possibility of it being metastatic should always be considered. In this series, we present the clinicopathological and immunohistochemical features of the thyroid metastases diagnosed in our department over the past 30 years. Here we present eight thyroidal metastases from clear cell renal cell carcinoma (ccRCCC), including a tumor to tumor metastasis, the patients being 2 men and 6 women with a median age of 62 years. The majority had a past history of goiter and a single and palpable metastasis. In one patient the thyroid metastases were the first sign of the ccRCCC. In the available cases, the metastasis showed positivity to PAX8 and CAIX and negativity to TTF1 and thyroglobulin. The median time from the detection of the primary renal tumor to thyroid metastasis and from thyroidectomy to last follow up were 84.17 and 54.50 months, respectively. After a median follow up of 158.50 months none of the patients had died from ccRCCC. Renal cell carcinoma (RCC) is the most frequent malignant neoplasm of the kidney and its incidence has increased over recent decades. In a clinical series, up to 1-3% of the oncologic thyroidectomies were due to thyroid metastases and the most frequent metastasizing tumor was RCC, followed by lung and breast cancer
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