Metastatic primary lung tumor in three dogsTumor primário pulmonar metastático em três cães

Primary lung tumors (PLT) are uncommon in dogs and occasionally metastasize to distant organs. This report describes three cases of PLT in dogs with epithelial origin, diagnosed post mortem through histopathology and immunohistochemistry. Case one presented nonspecific symptoms while the second and...

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Published in:Semina. Ciências agrárias : revista cultural e científica da Universidade Estadual de Londrina Vol. 33; no. Suplemento 2; pp. 3271 - 3278
Main Authors: Antônio Carlos Faria dos Reis, Ana Paula Frederico Rodrigues Loureiro Bracarense, Danilo Gouveia Wasques, Kerriel Thandile Green, Elisângela Olegário da Silva
Format: Journal Article
Language:English
Published: Universidade Estadual de Londrina 01-02-2012
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Summary:Primary lung tumors (PLT) are uncommon in dogs and occasionally metastasize to distant organs. This report describes three cases of PLT in dogs with epithelial origin, diagnosed post mortem through histopathology and immunohistochemistry. Case one presented nonspecific symptoms while the second and third cases presented respiratory alterations and radiographic exams revealed the presence of pulmonary nodule(s). Case 1 was diagnosed as a pulmonary papillary adenocarcinoma with metastasis to the mediastinal lymph nodes, liver and right adrenal gland. Case 2 was a pulmonary squamous cell carcinoma with metastasis to the heart, kidneys and perianal glan, whereas Case 3 was diagnosis as pulmonary papillary adenocarcinoma with metastasis to the pericardium and mediastinal lymph nodes. No previous report of epithelial TPP metastasis to pericardium, heart, liver, kidney and perianal gland. The three tumors showed positive immunostaining for the anti-pan-cytokeratin antibody and negative immunostaining for the anti-vimentin antibody. In dogs with PLT, the TNM clinical staging and histological classification and grading are fundamental for therapeutic planning and prognosis determination.Tumores primários pulmonares (TPP) são incomuns em cães e ocasionalmente metastatizam para órgãos distantes. Relatam-se três casos de TPP com origem epitelial em cães, diagnosticados pós-morte por meio do exame histopatológico e imuno-histoquímico. O caso 1 apresentou sinais clínicos inespecíficos, os casos 2 e 3 apresentaram sinais clínicos de alterações respiratórias e no exame radiográfico visualizouse nódulo(s) pulmonar. Os casos 1 e 3 foram diagnosticados como adenocarcinoma papilar pulmonar com metástase nos linfonodos mediastínicos, fígado, adrenal direita (caso 1) e, pericárdio e linfonodos mediastínicos (caso 3). O caso 2 apresentou carcinoma de células escamosas pulmonar com metástase no coração, rins e glândula perianal. Não há relatos prévios de metástase de TPP epitelial no pericárdio, coração, fígado, rim e glândula perianal. Os três tumores tiveram marcação positiva para o anticorpo anti-pancitoqueraina e negativa para o anticorpo anti-vimentina.
ISSN:1676-546X
1679-0359