Classificação citológica e imunocitoquímica dos linfomas caninos
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Data
2004
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Universidade Estadual Paulista (Unesp)
Resumo
Os linfomas estão entre as neoplasias mais freqüentes na espécie canina. Do ponto de vista etiológico, epidemiológico, clínico, morfológico e imunofenotípico os linfomas caninos apresentam muitas semelhanças com os linfomas não-Hodgkin humanos. No presente trabalho utilizou-se a técnica de Punção Aspirativa por Agulha Fina (PAAF) como método de diagnóstico de 59 casos de linfoma canino, que foram submetidos às classificações de Kiel e Working Formulation, utilizadas nos Linfomas não-Hodgkin humanos, e a classificação citológica para linfomas caninos, proposta por Fournel-Fleury et al. em 1994. Além disso, foram utilizados métodos imunocitoquímicos para a determinação do imunofenótipo de 38 destas neoplasias utilizando um marcador de células T (CD3) e um marcador de células B (CD79a). De acordo com a Classificação de Kiel, 61,02% dos linfomas foram classificados como de grau alto de malignidade e 38,98% como de grau baixo. O tipo mais freqüente nesta classificação foi o Linfoma Centroblástico. Segundo a Classificação da Working Formulation, 11,86% dos animais eram portadores de linfomas de grau baixo de malignidade, 61,02% de grau intermediário e 27,12% de grau alto. O tipo mais freqüente nesta classificação foi o Linfoma de Grandes Células Não Clivadas. Utilizando a classificação proposta por Fournel-Fleury et al. (1994), 38,98% dos animais eram portadores de linfomas de grau baixo e 61,02% de grau intermediário ou alto. O tipo mais... .
Lymphoma is one of the most frequent canine neoplasia and share many similarities with human non-Hodgkin’s lymphoma in respect of etiology, epidemiology, clinical, morphological and immunophenotipical aspects. The aim of this study was to apply Kiel, Working Formulation and Fournel-Fleury’s et al. (1994) non-Hodgkin’s classifications in a survey of 59 cases using Fine Needle Aspiration (FNA) and immunocytochemistry. According to Kiel scheme 61.02% were high-grade lymphomas and 38.98% low-grade. The Working Formulation, showed 11.86% of low-grade, 61.02% intermediate grade and 27.12% high-grade. In Fournel-Fleury’s protocol revealed a predominance of medium or high-grade lymphoma, with 61.02% over 38.98% of low -grade. Among the T-cell lymphomas the most frequent was Limphoblastic Lymphoma (27.30%) and for B-cell cases Centroblastic Lymphoma (38.46%) was predominant followed by Imunoblastic Lymphoma (30.77%). Immunophenotyping was performed with a panel of two antibodies CD3 (T-cell marker) and CD79a (B-cell marker). The immunocytochemical study revealed 57.89% of T-cell lymphomas, 34.21% of B-cell lymphomas and 7.90% were T/B lymphomas. In conclusion, FNA can be used as a diagnostic method and in canine lymphoma cytological and immunocytological classification. Kiel’s system showed the best results, once is based on cytological aspects.
Lymphoma is one of the most frequent canine neoplasia and share many similarities with human non-Hodgkin’s lymphoma in respect of etiology, epidemiology, clinical, morphological and immunophenotipical aspects. The aim of this study was to apply Kiel, Working Formulation and Fournel-Fleury’s et al. (1994) non-Hodgkin’s classifications in a survey of 59 cases using Fine Needle Aspiration (FNA) and immunocytochemistry. According to Kiel scheme 61.02% were high-grade lymphomas and 38.98% low-grade. The Working Formulation, showed 11.86% of low-grade, 61.02% intermediate grade and 27.12% high-grade. In Fournel-Fleury’s protocol revealed a predominance of medium or high-grade lymphoma, with 61.02% over 38.98% of low -grade. Among the T-cell lymphomas the most frequent was Limphoblastic Lymphoma (27.30%) and for B-cell cases Centroblastic Lymphoma (38.46%) was predominant followed by Imunoblastic Lymphoma (30.77%). Immunophenotyping was performed with a panel of two antibodies CD3 (T-cell marker) and CD79a (B-cell marker). The immunocytochemical study revealed 57.89% of T-cell lymphomas, 34.21% of B-cell lymphomas and 7.90% were T/B lymphomas. In conclusion, FNA can be used as a diagnostic method and in canine lymphoma cytological and immunocytological classification. Kiel’s system showed the best results, once is based on cytological aspects.
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Patologia veterinaria
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SUZANO, Sara Maria de Carvalho e. Classificação citológica e imunocitoquímica dos linfomas caninos. 2004. 110 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, 2004.