PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Muramoto C., Sterman F.A., Hagen S.C.F., Fonseca-Pinto A.C.B.C., Oliveira C.M., Faustino M., Talib M.S.F. & Torres L.N. 2011. [Ultrasonographic evaluation of lymph nodes for metastasis research of canine mammary tumor.] Avaliação ultrassonográfica de linfonodos na pesquisa de metástases de neoplasia mamária em cadelas. Pesquisa Veterinária Brasileira 31(11):1006-1013. Setor de Diagnóstico por Imagem, Faculdade de Medicina Veterinária, Instituto de Saúde e Produção Animal, Universidade Federal Rural da Amazônia, Av. Presidente Tancredo Neves 2501, Belém, PA 66077-530, Brazil. E-mail: cmuramoto@gmail.com Evaluation of lymph nodes is part of the staging of the mammary tumors and helps to establish a prognosis and therapy. B-mode ultrasonography was used to evaluate size, edge, nodal borders, shape, architecture, echotexture and echogenicity of lymph nodes and Doppler ultrasonography to evaluate the quantity and distribution of the vessels. The aims of this work were to identify which ultrasound features can be used to classify a lymph node as metastatic or non-metastatic; to establish its accuracy as a useful tool to this differentiation, and to establish procedures that permit the reproducibility of the results. Sixty seven lymph nodes of 30 female dogs with mammary tumors were examined by ultrasound and classified as metastatic or non-metastatic. The ultrasonographic diagnostic impression was confronted with the histopathologic results. The ultrasonographic classification of the lymph nodes was correct in 92.5% of the cases, with sensibility of 94.1%, specificity of 92%, positive predictive value of 0.8, and negative predictive value of 0.9787.The characteristics of the nodes to classify them as metastatic or non metastatic were registered. Ultrasound imaging of regional lymph nodes is important to detect metastases and it is suggested that it becomes a regular procedure in the staging of canine mammary tumors.

• Mammary tumors neoplasias mamárias

Abstract in Portuguese:

RESUMO.- Muramoto C., Sterman F.A., Hagen S.C.F., Fonseca-Pinto A.C.B.C., Oliveira C.M., Faustino M., Talib M.S.F. & Torres L.N. 2011. [Ultrasonographic evaluation of lymph nodes for metastasis research of canine mammary tumor.] Avaliação ultrassonográfica de linfonodos na pesquisa de metástases de neoplasia mamária em cadelas. Pesquisa Veterinária Brasileira 31(11):1006-1013. Setor de Diagnóstico por Imagem, Faculdade de Medicina Veterinária, Instituto de Saúde e Produção Animal, Universidade Federal Rural da Amazônia, Av. Presidente Tancredo Neves 2501, Belém, PA 66077-530, Brazil. E-mail: cmuramoto@gmail.com A avaliação de linfonodo, parte importante do estadiamento das neoplasias mamárias em cadelas, pode auxiliar no estabelecimento do prognóstico e na escolha da conduta terapêutica. A ultrassonografia em modo B possibilita avaliação de tamanho, contorno, borda, forma, arquitetura, ecotextura e ecogenicidade do parênquima dos linfonodos e, em modo Doppler, da quantidade e distribuição dos seus vasos internos. Este trabalho visou identificar as características ultrassonográficas mais importantes utilizadas para classificar os linfonodos em metastáticos e não-metastáticos, estabelecer elementos de confiabilidade do ultrassom como ferramenta para diferenciar linfonodos metastáticos de não-metastáticos e estabelecer procedimentos de reprodução deste exame. Foram examinados 67 linfonodos inguinais superficiais de 30 cadelas com tumor mamário e cada linfonodo foi classificado como metastático ou não-metastático. A impressão diagnóstica ultrassonográfica foi associada aos resultados do exame histopatológico dos linfonodos obtendo-se taxa de concordância de 92,5%, índice de sensibilidade de 94,1%, índice de especificidade de 92%, valor preditivo positivo de 0,8 e valor preditivo negativo de 0,9787. Características ultrassonográficas que classificaram um linfonodo como metastático ou como não-metastático foram listadas. O exame ultrassonográfico dos linfonodos regionais constitui importante ferramenta na detecção de metástase e sugere-se incluí-lo como rotina do estadiamento de neoplasias mamárias em cadelas.

Abstract in English:

ABSTRACT.- Zuccari D.A.P.C, Castro R., Gavioli A.F., Mancini U.M., Frade C.S., Pivaro L.R., Carmona-Raphe J., Terzian A.C.B., Ruiz C.M., Goloni-Bertollo E.M., Pavarino-Bertelli E.C. & Tajara E.H. 2009. The maspin expression in canine mammary tumors: An immunohistochemical and molecular study. Pesquisa Veterinária Brasileira 29(2):167-173. Centro Regional de Bioterismo, Faculdade de Medicina de São José do Rio Preto, Av. Brigadeiro Faria Lima 5416, São José do Rio Preto, SP 15090-000, Brazil. E-mail: debora.zuccari@famerp.br The serpin maspin, a tumor suppressor in breast cancer was described as an inhibitor of cell migration and inducer of cell adhesion between the basement membrane and extracellular matrix resulting in inhibition of tumor metastasis. In contrast, overexpression of maspin is correlated with poor prognosis in other types of cancer. Little is known about expression, regulation and function of maspin in canine mammary tumors. It was demonstrated in this study, a loss of maspin expression in malignant canine mammary cells compared with a pool of normal canine mammary tissue, analyzed by quantitative real-time PCR; weak maspin expression in malignant canine mammary tumors were observed by immunohistochemistry. It was also demonstrated that a correlation with nuclear maspin expression and a good prognosis. It is suggested that maspin could be used as a prognostic marker in canine mammary neoplasia.

• Maspin canine mammary tumor immunohistochemistry molecular biology prognosis

Abstract in Portuguese:

ABSTRACT.- Zuccari D.A.P.C, Castro R., Gavioli A.F., Mancini U.M., Frade C.S., Pivaro L.R., Carmona-Raphe J., Terzian A.C.B., Ruiz C.M., Goloni-Bertollo E.M., Pavarino-Bertelli E.C. & Tajara E.H. 2009. The maspin expression in canine mammary tumors: An immunohistochemical and molecular study. Pesquisa Veterinária Brasileira 29(2):167-173. Centro Regional de Bioterismo, Faculdade de Medicina de São José do Rio Preto, Av. Brigadeiro Faria Lima 5416, São José do Rio Preto, SP 15090-000, Brazil. E-mail: debora.zuccari@famerp.br The serpin maspin, a tumor suppressor in breast cancer was described as an inhibitor of cell migration and inducer of cell adhesion between the basement membrane and extracellular matrix resulting in inhibition of tumor metastasis. In contrast, overexpression of maspin is correlated with poor prognosis in other types of cancer. Little is known about expression, regulation and function of maspin in canine mammary tumors. It was demonstrated in this study, a loss of maspin expression in malignant canine mammary cells compared with a pool of normal canine mammary tissue, analyzed by quantitative real-time PCR; weak maspin expression in malignant canine mammary tumors were observed by immunohistochemistry. It was also demonstrated that a correlation with nuclear maspin expression and a good prognosis. It is suggested that maspin could be used as a prognostic marker in canine mammary neoplasia.