title: [Thyroid Metastasis as the Initial Presentation of an Asymptomatic Clear Cell Renal Carcinoma].
abstract: BACKGROUND
  Clear cell renal carcinoma metastases to the thyroid gland are rare and only diagnosable after an immunohistochemistry analysis of the histological sample. The purpose of this article is to report a case of thyroid metastasis as the initial presentation of a clear cell renal carcinoma.
  
  
  METHODS
  Male patient with a solid nodule in the left lobe of the thyroid, 5.3 cm in diameter, suspicious of malignancy, for which a total thyroidectomy with central compartment lymphadenectomy was performed. Histology revealed two clear cell renal carcinoma metastases. After evaluation of the kidney, the patient underwent radical nephrectomy four months later.
  
  
  CONCLUSIONS
  What makes this case interesting is that thyroid metastases as the initial presentation of renal cell carcinoma are rare, but if treated early, a 'double surgical resection' is possible, leading to a 5 year survival rate of 80%.
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: Janine
authors.initials: J
authors.lastname: Carmelino
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: Tavares
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: Ana
authors.initials: A
authors.lastname: Crespo
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: José Mário
authors.initials: JM
authors.lastname: Coutinho
authors.affiliation: Serviço de Anatomia Patológica. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: António
authors.initials: A
authors.lastname: Lázaro
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: Vasco
authors.initials: V
authors.lastname: Ribeiro
authors.affiliation: Serviço de Cirurgia Geral. Hospital de Curry Cabral. Centro Hospitalar de Lisboa Central. Lisboa. Portugal.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Barroso
mesh_terms: D002292:Carcinoma, Renal Cell / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology*; D008297:Male; D013964:Thyroid Neoplasms / Q000556:secondary*; D013965:Thyroidectomy
keywords: Carcinoma de Células Renais; Metástase Neoplásica; Neoplasias da Tiróide/secundária.