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                        "tituloSerie" => "Eur J Cardiothorac Surg"
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                            0 => "S&#46; Kanemitsu"
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                      "titulo" => "Use of caveolin-1&#44; thyroid transcription factor-1&#44; and cytokeratins 7 and 20 in discriminating between primary and secondary pulmonary adenocarcinoma from breast or colonic origin"
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                      "titulo" => "Role of TTF-1&#44; CK20&#44; and CK7 immunohistochemistry for diagnosis of primary and secondary lung adenocarcinoma"
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Vol. 45. Issue 11.
Pages 567-569 (November 2009)
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Vol. 45. Issue 11.
Pages 567-569 (November 2009)
Case report
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Solitary Pulmonary Nodule: Primary, Metastatic, or Both?
Nódulo pulmonar solitario: ¿primario, metastático o ambos?
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Gerardo Andrés Obeso Carilloa,
Corresponding author
andresobca@hotmail.com

Corresponding author.
, José Eduardo Rivo Vázqueza, Miguel Ángel Cañizares Carreteroa, Eva García Fontána, Montserrat Blanco Ramosa, José Luis García Tejedorb
a Servicio de Cirugía Torácica, Complejo Hospitalario Universitario, Vigo, Pontevedra, Spain
b Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario, Vigo, Pontevedra, Spain
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Article information
Abstract

The lung is the most common site for metastasis from colorectal cancer, which is among the most common neoplasms in developed countries. Simultaneous occurrence of pulmonary metastasis of colorectal origin and primary carcinoma has been reported.

We describe the case of a 65-year-old man who underwent low anterior resection for colorectal adenocarcinoma in 2007. Follow-up computed tomography revealed a pulmonary nodule that was classified as metastatic. The patient was referred to our thoracic surgery department, where the nodule was resected. The pathology confirmed that the nodule was neoplastic, and histologic and immunohistochemical examination showed the presence of colorectal metastasis and lung adenocarcinoma. Evidence of metastasis was also found in 2 of the lymph nodes analyzed, 1 with features identical to the primary pulmonary adenocarcinoma, and 1 with features identical to the colorectal metastasis.

Keywords:
Pulmonary metastasis of colon cancer
Lung adenocarcinoma
Synchronous neoplasms
Resumen

El cáncer colorrectal constituye una de las neoplasias más frecuentes en los países desarrollados, y es el pulmón uno de los órganos más afectados por su diseminación metastásica. Se han publicado casos donde dicha afectación metastásica pulmonar de origen colorrectal coexiste simultáneamente con un cáncer primario.

Presentamos el caso de un varón de 65 años diagnosticado de adenocarcinoma colorrectal, al que se realizó en 2007 una resección anterior baja. En una tomografía computarizada de control se detectó el crecimiento de un nódulo pulmonar catalogado como metástasis de la neoplasia. Remitido a nuestro Servicio de Cirugía Torácica, se procedió a su resección. El estudio anatomopatológico demostró que se trataba de un nódulo pulmonar neoplásico, en el que se diferenciaba tanto histológica como inmunohistoquímicamente una metástasis de adenocarcinoma de colon sobre un adenocarcinoma pulmonar. Dos de las adenopatías aisladas aparecían metastatizadas por adenocarcinoma, una con rasgos idénticos al componente enteroide y otra al componente pulmonar.

Palabras clave:
Metástasis pulmonar de colon
Adenocarcinoma pulmonar
Neoplasias sincrónicas
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