Comparative study of histopathology and immunohistochemistry of indefinite round cell cutaneous tumors and characterization of canine lymphoma

• Main Author: Machado, Luiz Henrique de Araújo [UNESP]
• Publication Date: 2015
• Other Authors: Palumbo, Mariana Isa Poci [UNESP], Zahn, Fabíola Soares [UNESP], Amorim, Renée Laufer [UNESP], Farias, Marconi Rodrigues de, Werner, Juliana, Torres Neto, Rafael [UNESP], Rodrigues, Jéssica Correa [UNESP], Oliveira, Fernanda Cristina [UNESP]
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1590/1678-7328; http://hdl.handle.net/11449/141865
• topic: Dog; Histopathology; Immunohistochemistry; Round cell neoplasia; Lymphoma; Cão; Histopatologia; Imuno-histoquímica; Neoplasias de células redondas; Linfoma

With the purpose of shedding light on some doubts in veterinary oncology, the present article intends to compare the results of histopathological and immunohistochemical examinations of unspecific round cell neoplasia, to realize immunophenotyping of canine lymphoma cases, to establish the T or B origin of neoplastic cells, and to determine the degree of proliferation and apoptosis of lymphomas by immunohistochemistry. Of 11 animals presenting immunohistochemical diagnosis of lymphoma, five had been diagnosed as Lymphoma by HE staining of histopathological slides and six had been classified as unspecific round cell neoplasia. All cases submitted to immunohistochemical examination were T-cell lymphomas. There was a positive correlation between cell proliferation and apoptosis. The comparison among histopathological and immunohistochemical results obtained in the cases examined in the present study suggested that immunohistochemistry is essential for the differentiation of round cell neoplasia.