RESUMO
A expressão de caderinas tem sido correlacionada ao desenvolvimento e agressividade de neoplasias epiteliais, entretanto, em tumores mamários caninos, seu prognóstico de importância é incerto. Devido a esse fato, a expressão das moléculas de adesão intracelular E e P-caderina e a correlação com a sobrevida global foram analisadas em 25 tumores de glândula mamária canina. A redução da expressão da caderina-E foi correlacionada com o tipo histológico, alto grau histológico e taxa de sobrevida global. A coloração de P-caderina foi maior em tumores malignos, sem relação com outras características clínico-patológicas de agressividade. Os resultados deste estudo sugerem uma relação entre menor expressão de E e P-caderina e pior prognóstico em tumores mamários caninos, incluindo menor sobrevida global.
Assuntos
Animais , Cães , Caderinas , Cães/anatomia & histologia , Cães/imunologia , Imuno-Histoquímica/veterinária , Neoplasias Mamárias Animais/diagnósticoRESUMO
A expressão de caderinas tem sido correlacionada ao desenvolvimento e agressividade de neoplasias epiteliais, entretanto, em tumores mamários caninos, seu prognóstico de importância é incerto. Devido a esse fato, a expressão das moléculas de adesão intracelular E e P-caderina e a correlação com a sobrevida global foram analisadas em 25 tumores de glândula mamária canina. A redução da expressão da caderina-E foi correlacionada com o tipo histológico, alto grau histológico e taxa de sobrevida global. A coloração de P-caderina foi maior em tumores malignos, sem relação com outras características clínico-patológicas de agressividade. Os resultados deste estudo sugerem uma relação entre menor expressão de E e P-caderina e pior prognóstico em tumores mamários caninos, incluindo menor sobrevida global.(AU)
Assuntos
Animais , Cães , Cães/anatomia & histologia , Cães/imunologia , Imuno-Histoquímica/veterinária , Caderinas , Neoplasias Mamárias Animais/diagnósticoRESUMO
Mammary neoplasms are the most frequent tumors in female dogs. Of these neoplasms, benign mixed tumors (BMTs) and carcinomas in mixed tumors (CMTs) represent a large proportion of small animal oncology diagnoses. Together with carcinosarcomas (CSs), these three neoplastic entities are characterized by the proliferation of benign or malignant epithelial, myoepithelial, and mesenchymal cells, depending on their histological types. This histological heterogeneity, in addition to their molecular heterogeneity, confers these tumors with distinct biological behavior, which results in the need for different clinical and therapeutic approaches. The present consensual document elucidates the oncological issues related to the diagnosis, prognosis, and treatment of BMTs, CMTs, and CSs of the canine mammary gland.(AU)
Assuntos
Animais , Feminino , Cães , Carcinossarcoma/veterinária , Carcinoma/diagnóstico , Carcinoma/veterinária , Carcinossarcoma/diagnóstico , /diagnóstico , Neoplasias Mamárias Animais/tratamento farmacológicoRESUMO
Mammary neoplasms are the most frequent tumors in female dogs. Of these neoplasms, benign mixed tumors (BMTs) and carcinomas in mixed tumors (CMTs) represent a large proportion of small animal oncology diagnoses. Together with carcinosarcomas (CSs), these three neoplastic entities are characterized by the proliferation of benign or malignant epithelial, myoepithelial, and mesenchymal cells, depending on their histological types. This histological heterogeneity, in addition to their molecular heterogeneity, confers these tumors with distinct biological behavior, which results in the need for different clinical and therapeutic approaches. The present consensual document elucidates the oncological issues related to the diagnosis, prognosis, and treatment of BMTs, CMTs, and CSs of the canine mammary gland.
Assuntos
Feminino , Animais , Cães , Carcinoma/diagnóstico , Carcinoma/veterinária , Carcinossarcoma/diagnóstico , Carcinossarcoma/veterinária , Neoplasias Mamárias Animais/tratamento farmacológicoRESUMO
OBJECTIVES: The aim of the study was to investigate prognostic factors in feline mammary gland neoplasms, correlating them with overall survival (OS). METHODS: Fifty-six primary malignant mammary gland neoplasms and 16 metastatic lymph nodes from 37 female cats were analyzed. Clinical staging, histologic type and grade, and immunohistochemistry for Ki-67, progesterone and estrogen receptor, human epidermal growth factor receptor type 2 (HER-2), cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) were evaluated. Follow-up was performed in order to correlate prognostic factors with OS. RESULTS: Lymph node metastasis was found in 35% of cases. Clinical stage III, tubulopapillary carcinomas and histologic grade II cases prevailed in the study. Most neoplasms were positive for hormonal receptors, negative for HER-2 overexpression and presented VEGF overexpression. Immunoreactivity for Ki-67 (P = 0.046) and COX-2 (P = 0.007) was higher in metastases than in primary tumors. COX-2 (P = 0.089), HER-2 (P = 0.012) and histologic grade (P = 0.080) were correlated with OS. CONCLUSIONS AND RELEVANCE: The data suggest that inhibition of ovarian hormones and COX-2 may represent a therapeutic option for malignant feline mammary gland neoplasms. When evaluating disease progression, COX-2 scores and Ki-67 index should be analyzed in primary tumors and metastases. Histologic grade, HER-2 status and COX-2 scores were found to have a direct influence on OS. Prognostic factors allow for a better understanding of disease outcome in a condition that is characterized by a poor prognosis. The present work highlights the need for further studies on endocrine therapy and COX-2 inhibitors, which could influence OS.
Assuntos
Biomarcadores/metabolismo , Doenças do Gato/enzimologia , Ciclo-Oxigenase 2/biossíntese , Neoplasias Mamárias Animais/enzimologia , Animais , Brasil , Doenças do Gato/mortalidade , Doenças do Gato/patologia , Gatos , Intervalo Livre de Doença , Feminino , Imuno-Histoquímica/veterinária , Metástase Linfática , Neoplasias Mamárias Animais/mortalidade , Neoplasias Mamárias Animais/secundário , Prognóstico , Estudos RetrospectivosRESUMO
OBJECTIVE: The aim of this study was to evaluate important clinical, morphological, histopathological, histochemical, and immunohistochemical characteristics in order to establish the diagnosis and prognosis of a low-grade intra-orbital myxosarcoma. ANIMAL STUDIED: A mongrel dog presented a 2-year history of a neoplastic mass behind the right eye. RESULTS: The neoplasm presented a mesenchymal spindle and stellate cell proliferation with an abundant myxoid matrix, moderate anisocariosis, and a low mitotic index. It stained positive for vimentin, moderately positive for periodic acid-Schiff, and negative for Gomori trichrome stain and α-smooth muscle actin. CONCLUSIONS: One year following surgical excision, the patient remains disease free. The histological findings established a diagnosis of a rare canine intra-orbital low-grade myxosarcoma.
Assuntos
Doenças do Cão/patologia , Neoplasias Oculares/patologia , Mixossarcoma/veterinária , Animais , Doenças do Cão/cirurgia , Cães , Neoplasias Oculares/cirurgia , Mixossarcoma/patologia , Mixossarcoma/cirurgiaRESUMO
The purpose of this paper is to establish criteria that could guide the diagnosis, prognosis and treatment of caninemammary neoplasias. It was elaborated during the Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment ofthe Canine Mammary Neoplasia, held on November 6th and 7th, 2010 in Belo Horizonte MG, Brazil. Academics fromseveral regions of Brazil were present and contributed to this work. After three years, a new discussion was foundnecessary in order to address important questions: 1 - Have Brazilian DVMs applied the consensus? 2 - What were the maindifficulties in applying the consensus? 3 - What were the obtained results? 4 - What were the main differences among thevarious oncology services/groups? 5 - How could the criteria be improved and uniformed? A spreadsheet that allowed datacollection and an abstract was submitted by each oncology service/group from various parts of the country. Based on theabstracts we identified the main differences in diagnosis and therapeutic conducts among the groups. These differences haveguided the discussions of the II Mammary Pathology Meeting and the publication of a second consensus that has beenrevised and updated. The II Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment of the Canine mamaryNeoplasia, was held on December 9th, 10thand 11th, 2013 in Belo Horizonte MG, sponsored by the Laboratory ofComparative Pathology of the Federal University of Minas Gerais (UFMG), with the support of the Brazilian Associationof Veterinary Pathology (ABPV) and Brazilian Association of Veterinary Oncology (ABROVET). Academics from severalregions of Brazil were present and contributed to this work.
Assuntos
Feminino , Animais , Cães , Neoplasias Mamárias Animais/diagnóstico , Neoplasias Mamárias Animais/terapia , Protocolos Antineoplásicos , BrasilRESUMO
The purpose of this paper is to establish criteria that could guide the diagnosis, prognosis and treatment of caninemammary neoplasias. It was elaborated during the Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment ofthe Canine Mammary Neoplasia, held on November 6th and 7th, 2010 in Belo Horizonte MG, Brazil. Academics fromseveral regions of Brazil were present and contributed to this work. After three years, a new discussion was foundnecessary in order to address important questions: 1 - Have Brazilian DVMs applied the consensus? 2 - What were the maindifficulties in applying the consensus? 3 - What were the obtained results? 4 - What were the main differences among thevarious oncology services/groups? 5 - How could the criteria be improved and uniformed? A spreadsheet that allowed datacollection and an abstract was submitted by each oncology service/group from various parts of the country. Based on theabstracts we identified the main differences in diagnosis and therapeutic conducts among the groups. These differences haveguided the discussions of the II Mammary Pathology Meeting and the publication of a second consensus that has beenrevised and updated. The II Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment of the Canine mamaryNeoplasia, was held on December 9th, 10thand 11th, 2013 in Belo Horizonte MG, sponsored by the Laboratory ofComparative Pathology of the Federal University of Minas Gerais (UFMG), with the support of the Brazilian Associationof Veterinary Pathology (ABPV) and Brazilian Association of Veterinary Oncology (ABROVET). Academics from severalregions of Brazil were present and contributed to this work.(AU)
Assuntos
Animais , Feminino , Cães , Neoplasias Mamárias Animais/diagnóstico , Neoplasias Mamárias Animais/terapia , Protocolos Antineoplásicos , BrasilRESUMO
BACKGROUND: Components of the extracellular matrix have been studied in an attempt to elucidate the mechanisms involved in the biological behaviour of tumours. The presence of the proteoglycan versican has been strongly associated with cancer development and progression. However, relationship between versican expression and clinical pathological factors and overall survival has not been previously studied in veterinary medicine. Carcinomas in benign mixed tumours (CBMTs) are one of the most common malignant tumours in female canines and can serve as models for studies of tumour progression. The aim of this study was to evaluate the expression of versican in in situ and invasive carcinomatous areas of canine CBMTs and to evaluate possible associations of versican expression with other classic prognostic factors and overall survival. RESULTS: Clinical staging; histological grade determination; immunohistochemical staining for versican, E-cadherin and Ki-67; and confirmation of invasion areas by staining for p63 and smooth muscle α-actin (α-SMA) were performed on 49 canine cases of CBMT. Tumour invasion was considered when suspicious Haematoxylin-Eosin (HE)-stained areas showed a total loss of α-SMA and p63 immunoreactivity. Versican immunoreactivity was less intense in the areas adjacent to the in situ carcinomatous regions, compared to invasive regions, which showed extensive and strong staining. CONCLUSIONS: Our data reveal that in canine CBMTs, versican expression differs significantly between invasive and in situ areas, suggesting a role for this molecule in tumour progression. Although a direct relationship exists between versican and invasiveness, our results indicate that the isolated evaluation of this proteoglycan does not represent an independent prognostic factor in canine CBMTs.
Assuntos
Carcinoma/metabolismo , Doenças do Cão/metabolismo , Regulação Neoplásica da Expressão Gênica/fisiologia , Neoplasias Mamárias Animais/patologia , Versicanas/metabolismo , Animais , Adesão Celular , Proliferação de Células , Cães , Feminino , Neoplasias Pulmonares/secundário , Neoplasias Pulmonares/veterinária , Linfonodos/patologia , Masculino , Neoplasias Mamárias Animais/metabolismo , Invasividade Neoplásica , Versicanas/genéticaRESUMO
The purpose of this paper is to establish criteria that could guide the diagnosis, prognosis and treatment of canine mammary neoplasias. It was elaborated during the Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment of the Canine Mammary Neoplasm, held on November 6th and 7th, 2010 in Belo Horizonte MG, Brazil, sponsored by the Laboratory of Comparative Pathology UFMG, with the support of the Brazilian Association of Veterinary Pathology (ABPV) and Brazilian Association of Veterinary Oncology (ABROVET). Academics from several regions of Brazil were present and contributed to this work.(AU)