RESUMO
Background: The human epidermal growth factor type 2 (HER2) receptor is a membrane glycoprotein tyrosine kinase. In woman, HER2 expression is diagnosed in 30% of breast carcinomas and it is associated with a worse prognosis, higher rate of recurrence and mortality. In the bitch, the HER2 overexpression in canine mammary tumors is still controversial and the prognostic value remains uncertain. Thus, we aimed to verify the HER2 expression in canine mammary carcinomas and relate it to the type and histological grade, lymph node metastasis and clinical staging. Materials, Methods & Results: Ninety bitches diagnosed with mammary carcinoma were included in this study. The inclusion criteria were bitches with complete clinical examination, thoracic radiographic examination and submitted unilateral or bilateral mastectomy. Ninety-nine samples of mammary carcinoma were used and the fragments of tumor and regional lymph nodes were fixed in 10% neutral formalin for histopathological and immunohistochemistry analysis. The lesions were evaluated by two pathologists and classified according to the type and histological grade. HER2 expression was performed by semi-quantitative analysis of the slides according to the HerceptTestTM (Dako) recommended score. Simple carcinomas were the most frequent (51.51%) followed by complex carcinomas (46.47%) and in situ carcinoma (2.02%). [...]
Assuntos
Feminino , Animais , Cães , Neoplasias Mamárias Animais , Prognóstico , Receptores ErbB/análise , Imuno-Histoquímica/veterinária , Metástase NeoplásicaRESUMO
Background: The human epidermal growth factor type 2 (HER2) receptor is a membrane glycoprotein tyrosine kinase. In woman, HER2 expression is diagnosed in 30% of breast carcinomas and it is associated with a worse prognosis, higher rate of recurrence and mortality. In the bitch, the HER2 overexpression in canine mammary tumors is still controversial and the prognostic value remains uncertain. Thus, we aimed to verify the HER2 expression in canine mammary carcinomas and relate it to the type and histological grade, lymph node metastasis and clinical staging. Materials, Methods & Results: Ninety bitches diagnosed with mammary carcinoma were included in this study. The inclusion criteria were bitches with complete clinical examination, thoracic radiographic examination and submitted unilateral or bilateral mastectomy. Ninety-nine samples of mammary carcinoma were used and the fragments of tumor and regional lymph nodes were fixed in 10% neutral formalin for histopathological and immunohistochemistry analysis. The lesions were evaluated by two pathologists and classified according to the type and histological grade. HER2 expression was performed by semi-quantitative analysis of the slides according to the HerceptTestTM (Dako) recommended score. Simple carcinomas were the most frequent (51.51%) followed by complex carcinomas (46.47%) and in situ carcinoma (2.02%). [...](AU)
Assuntos
Animais , Feminino , Cães , Receptores ErbB/análise , Neoplasias Mamárias Animais , Prognóstico , Imuno-Histoquímica/veterinária , Metástase NeoplásicaRESUMO
Background: Canine visceral leishmaniasis is a chronic and endemic disease, widespread zoonotic infection with a greatimpact on public health. The domestic dog is the main reservoir and also a source of infection for humans in the urbanenvironment. Canine visceral leishmaniasis is a multisystem disease that affects several organs, mainly the heart. The aimof this study was to verify the presence of amastigotes of Leishmania chagasi in myocardium of dogs naturally infectedby immunohistochemistry. In addition, to correlate the number of parasitized cells with the intensity of the inflammation,the macroscopic and microscopic lesions.Materials, Methods & Results: It were used 52 dogs positive for leishmaniasis diagnosed by clinical examination, IndirectImmunofluorescence (RIFI), ELISA and cytological analysis of popliteal lymph nodes. The positive animals were euthanized and submitted a necropsy. Following necropsy, the macroscopic analysis was done, and samples from the region ofthe cardiac apex were collected at the transition between the two ventricles. Fragments of heart tissues were fixed in 10%neutral formalin for histopathological and immunohistochemistry analysis. The inflammatory process of the myocardiumand lesions semi-quantitatively scored for myocardial injury on a scale of 0 to 3: (0) absent, (1) mild = small focal lesions,(2) moderate = larger, multifocal lesions and (3) severe = affecting most areas with coalescence. On immunostaining,the animal was classified according to the parasite load: - (no microorganism), mild (1-100 microorganisms), moderate(101-300), intense parasitism (> 300). At the macroscopically analysis, 33 animals (63.46%) had at least one lesion. Theconcentric hypertrophy left ventricular was the most...
Assuntos
Animais , Cães , Coração/parasitologia , Imuno-Histoquímica/veterinária , Leishmania , Miocardite/veterináriaRESUMO
Background: Canine visceral leishmaniasis is a chronic and endemic disease, widespread zoonotic infection with a greatimpact on public health. The domestic dog is the main reservoir and also a source of infection for humans in the urbanenvironment. Canine visceral leishmaniasis is a multisystem disease that affects several organs, mainly the heart. The aimof this study was to verify the presence of amastigotes of Leishmania chagasi in myocardium of dogs naturally infectedby immunohistochemistry. In addition, to correlate the number of parasitized cells with the intensity of the inflammation,the macroscopic and microscopic lesions.Materials, Methods & Results: It were used 52 dogs positive for leishmaniasis diagnosed by clinical examination, IndirectImmunofluorescence (RIFI), ELISA and cytological analysis of popliteal lymph nodes. The positive animals were euthanized and submitted a necropsy. Following necropsy, the macroscopic analysis was done, and samples from the region ofthe cardiac apex were collected at the transition between the two ventricles. Fragments of heart tissues were fixed in 10%neutral formalin for histopathological and immunohistochemistry analysis. The inflammatory process of the myocardiumand lesions semi-quantitatively scored for myocardial injury on a scale of 0 to 3: (0) absent, (1) mild = small focal lesions,(2) moderate = larger, multifocal lesions and (3) severe = affecting most areas with coalescence. On immunostaining,the animal was classified according to the parasite load: - (no microorganism), mild (1-100 microorganisms), moderate(101-300), intense parasitism (> 300). At the macroscopically analysis, 33 animals (63.46%) had at least one lesion. Theconcentric hypertrophy left ventricular was the most...(AU)