Resultado da pesquisa (4)

Termo utilizado na pesquisa Leite J.S.

#1 - Feline application/inflammation-associated sarcoma: Gross aspects and histomorphological

Abstract in English:

Feline injection-site sarcomas in felines account for more than 40% of cutaneous and subcutaneous neoplasms in felines. The present study aimed to describe the macroscopic and histomorphological findings of feline application/injection sarcomas. Samples from 31 feline tumors with a history of feline application/inflammation sarcoma were re-evaluated regarding histological subtype, mitotic index and score, depth of tissue invasion, and presence of inflammation considering the location, intensity and predominant cell types. Of the 31 samples from felines diagnosed with sarcoma at the application/inflammation site, 87.15% were cats with no defined breed (NDB), with a mean age of 8.5 years. The predominant anatomical sites were the back and flank/abdomen, both with 29% (9/31), and the prevalent histological subtype was fibrosarcoma at 77.4% (24/31), followed by anaplastic giant cell sarcoma at 12.9% (4/31) and myxosarcoma 9.6% (3/31). The histological grade with the highest number of cases was III (51.6%), followed by Grade II (35.4%) and I (12.9%). The mean of the longest axis measurements varied between the different tumor grades without being significant, with the average being 2.5±2.79cm in Grade I tumors and 3.2±2.28cm in Grade II tumors. and 4.68±2.07cm in Grade III tumors. Necrosis was observed in 74.2% of tumors. The tissue inflammation score was mild to moderate in 58% of cases and severe in 32.2%, with lymphocytic and lymphoplasmacytic infiltrates being prevalent, with 25.8% each, followed by lymphoplasmohistiocytic with 22.6%. The infiltration depth was 38.7% in muscle tissue, followed by 32.2% in the subcutaneous tissue. Pleomorphism was accentuated in 51.6%. Desmoplasia was moderate in 45.1%. Satellite nodules were present in 29% of cases, and 19.4% had macrophages with intracytoplasmic content suggestive of adjuvants. Surgical margins were infiltrated (M1) in 48.4% and narrowed in 25.8% (M2). The anatomical locations observed were different from those recommended by the Vaccine-Associated Feline Sarcoma Task Force (VAFST); in most cases, the adjuvanted macrophage was not present. From this data, we can suggest that sarcomas in felines are not only correlated to the vaccine application, corroborating the hypothesis that any material, whether liquid or solid, and any chronic inflammatory process in the subcutaneous tissue of cats can induce the entity if they are predisposed to do so. The detailed histomorphological data evaluated in this study were key points and provided important information about tumor behavior, being a tool for clinical-oncological decision-making.

Abstract in Portuguese:

Feline injection-site sarcomas in felines account for more than 40% of cutaneous and subcutaneous neoplasms in felines. The present study aimed to describe the macroscopic and histomorphological findings of feline application/injection sarcomas. Samples from 31 feline tumors with a history of feline application/inflammation sarcoma were re-evaluated regarding histological subtype, mitotic index and score, depth of tissue invasion, and presence of inflammation considering the location, intensity and predominant cell types. Of the 31 samples from felines diagnosed with sarcoma at the application/inflammation site, 87.15% were cats with no defined breed (NDB), with a mean age of 8.5 years. The predominant anatomical sites were the back and flank/abdomen, both with 29% (9/31), and the prevalent histological subtype was fibrosarcoma at 77.4% (24/31), followed by anaplastic giant cell sarcoma at 12.9% (4/31) and myxosarcoma 9.6% (3/31). The histological grade with the highest number of cases was III (51.6%), followed by Grade II (35.4%) and I (12.9%). The mean of the longest axis measurements varied between the different tumor grades without being significant, with the average being 2.5±2.79cm in Grade I tumors and 3.2±2.28cm in Grade II tumors. and 4.68±2.07cm in Grade III tumors. Necrosis was observed in 74.2% of tumors. The tissue inflammation score was mild to moderate in 58% of cases and severe in 32.2%, with lymphocytic and lymphoplasmacytic infiltrates being prevalent, with 25.8% each, followed by lymphoplasmohistiocytic with 22.6%. The infiltration depth was 38.7% in muscle tissue, followed by 32.2% in the subcutaneous tissue. Pleomorphism was accentuated in 51.6%. Desmoplasia was moderate in 45.1%. Satellite nodules were present in 29% of cases, and 19.4% had macrophages with intracytoplasmic content suggestive of adjuvants. Surgical margins were infiltrated (M1) in 48.4% and narrowed in 25.8% (M2). The anatomical locations observed were different from those recommended by the Vaccine-Associated Feline Sarcoma Task Force (VAFST); in most cases, the adjuvanted macrophage was not present. From this data, we can suggest that sarcomas in felines are not only correlated to the vaccine application, corroborating the hypothesis that any material, whether liquid or solid, and any chronic inflammatory process in the subcutaneous tissue of cats can induce the entity if they are predisposed to do so. The detailed histomorphological data evaluated in this study were key points and provided important information about tumor behavior, being a tool for clinical-oncological decision-making.


#2 - Refractory feline sporotrichosis: a comparative analysis on the clinical, histopathological, and cytopathological aspects

Abstract in English:

Sporotrichosis is a chronic fungal infection caused by Sporothrix species. The occurrence of cases that are resistant to long-term treatment, especially in the nasal planum of cats, emphasizes the importance of studying its pathogenesis. The purpose of this study was to analyze and compare the inflammatory process of cutaneous lesions of feline refractory sporotrichosis to clinical aspects through cytopathological and histopathological examination. Moreover, the study included 13 cats with cutaneous lesions that had been resistant to itraconazole treatment for more than a year. Cutaneous lesions samples were collected for cytopathological, histopathological, and fungal culture analyses. Tissue fragments were processed and stained with hematoxylin-eosin (HE) and Grocott methenamine silver (GMS). Further, two clinical presentations had the highest occurrence: the localized cutaneous form in animals with good general condition and stable disease (n=9, 69.2%) and the disseminated cutaneous form in cats with poor general condition (n=4, 30.8%). In cats with refractory sporotrichosis, the nasal planum (84.6%) was the most common location of lesions. In the cytopathological study, cats with fewer than two lesions and in good general condition (n=9, 69.2%) showed absence or mild yeast intensity (up to 5 yeasts per field), lower intensity of macrophages and neutrophils, and higher intensity of epithelioid cells, lymphocytes, plasma cells, and eosinophils. On the other hand, (n=4, 30.8%) of the cats with disseminated sporotrichosis and a poor general condition had a marked intensity of yeasts, which were mostly phagocytosed by an increased number of macrophages and neutrophils. Of those animals with good general condition, the majority (n=6, 66.7%) had higher eosinophil intensity. In histopathology, malformed suppurative granuloma was the predominant type (n=9, 69.2%) in feline sporotrichosis lesions, followed by well-formed granulomas (n=4, 30.8%). Malformed granulomas showed mild to moderate fungal intensity (55.6%) in animals with good general condition and localized lesions while marked fungal intensity (44.4%) in cats with the disseminated form of the disease and poor general condition. Well-formed granulomas (n=4, 30.7%) had mild to moderate intensity of fungal load, and 75% of the animals with this type of granuloma had only one lesion and were in good general condition. Long-term itraconazole treatment in these cats with refractory sporotrichosis can keep the infection under control and localized lesions stable; however, fungus reactivation can occur, resulting in an exuberant and inefficient immune response.

Abstract in Portuguese:

A esporotricose é uma infecção fúngica crônica causada por espécies do gênero Sporothrix. A ocorrência de casos refratários ao tratamento de longo prazo, especialmente na região nasal de gatos, alerta para a importância do estudo de sua patogênese. Este estudo teve como objetivo analisar o processo inflamatório das lesões cutâneas de esporotricose felina refratária ao tratamento, por meio de exames citopatológico e histopalógico, e comparar com aspectos clínicos. Treze gatos com lesões cutâneas refratárias ao tratamento com Itraconazol por mais de um ano foram incluídos no estudo. Amostras de lesões cutâneas foram coletadas para análises citopatológicas, histopatológicas e cultura fúngica. Fragmentos de tecidos foram processados e corados pela hematoxilina-eosina (HE) e Prata Metenamina de Grocott (GMS). Duas apresentações clínicas tiveram maior ocorrência: a forma localizada cutânea em animais com bom estado geral e doença estável (n=9, 69,2%); e a forma disseminada cutânea em gatos com estado geral ruim (n=4, 30,8%). A região nasal (84,6%) foi a localização mais frequente das lesões nos gatos com esporotricose refratária ao tratamento. No estudo citopatológico, felinos com menos de duas lesões, e em bom estado geral, (n=9, 69,2%) revelaram ausência ou leve intensidade de leveduras (até 5 leveduras por campo), menor intensidade de macrófagos e neutrófilos, e maior intensidade de células epitelióides, linfócitos, plasmócitos e eosinófilos. Enquanto, (n=4, 30,8%) dos felinos que apresentavam a forma disseminada da esporotricose associada a um estado geral ruim, revelaram acentuada intensidade de leveduras em sua maioria fagocitadas por acentuado número de macrófagos e neutrófilos. Dos animais com bom estado geral, a maioria (n=6, 66,7%) apresentava maior intensidade de eosinófilos. Na histopatologia, o granuloma supurativo mal formado foi o tipo predominante (n=9, 69,2%) nas lesões de esporotricose felina, e (n=4, 30,8%) foram de granulomas bem formados. Granulomas mal formados apresentaram leve a moderada intensidade fúngica (55,6%) nos animais com bom estado geral e lesões localizadas, e acentuada intensidade fúngica (44,4%) nos gatos com a forma disseminada da doença e estado geral ruim. Granulomas bem formados (n=4, 30,7%) apresentaram leve a moderada intensidade de carga fúngica, sendo 75% dos animais com esse tipo de granuloma com apenas uma lesão e bom estadogeral. O tratamento de longo prazo com itraconazol, nesses gatos com esporotricose refratária, pode manter a infecção controlada e lesões localizadas estáveis de forma temporária, contudo a reativação do fungo pode ocorrer levando a uma resposta imunológica exuberante e ineficiente.


#3 - Helicobacter spp. in domestic cats: identification and relationship with anatomical and histopathological gastric changes in animals of blood group A, 37(12):1467-1473

Abstract in English:

ABSTRACT.- Sousa D.A., Cascon C.M., Mello M.F.V., Leite J.S., Medeiros M.A., Fonseca A.B.M. & Ferreira A.M.R. 2017. Helicobacter spp. in domestic cats: identification and relationship with anatomical and histopathological gastric changes in animals of blood group A. Pesquisa Veterinária Brasileira 37(12):1467-1473. Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil 64, Niterói, RJ 24230-340, Brazil. E-mail: anatopatovet@vm.uff.br The aim of this study was to evaluate the presence of gastric Helicobacter-like organisms and the endoscopic and histopathological changes in domestic cats with blood type A. Samples from the stomach antrum, body and fundus were collected from 32 mixed-breed stray domestic cats using gastroscopy. Urease testing and cytological analysis were performed in fresh samples. Tissue sections were processed and stained with hematoxylin and eosin (H&E) and the Warthin–Starry (WS) silver staining methods for histopathological examination. Helicobacter spp. were detected in 100% of samples subjected to silver staining and cytological analysis, and in 96.9% of samples subjected to urease testing. In 87.5% of the cats, mononuclear inflammatory-cell infiltrates were identified. The graduation and distribution of inflammatory infiltrates in these cats revealed mild (78.1%) to moderate (9.4%) inflammatory changes in at least one gastric region. These changes were independent of the colonization score. Hyperplasia of the lymphoid follicles was detected in three cats. Cats of blood group A are often colonized by Helicobacter spp. and the macroscopic and microscopic findings are consistent with studies in domestic cats reported to date, concluding that the most common blood group in cats is not associated with high susceptibility to symptomatic gastritis.

Abstract in Portuguese:

RESUMO.- Sousa D.A., Cascon C.M., Mello M.F.V., Leite J.S., Medeiros M.A., Fonseca A.B.M. & Ferreira A.M.R. 2017. Helicobacter spp. in domestic cats: identification and relationship with anatomical and histopathological gastric changes in animals of blood group A. [Helicobacter spp. em gatos domésticos: identificação e relação com alterações gástricas anatômicas e histopatológicas em animais de sangue tipo A.] Pesquisa Veterinária Brasileira 37(12):1467-1473. Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil 64, Niterói, RJ 24230-340, Brazil. E-mail: anatopatovet@vm.uff.br O objetivo deste estudo foi avaliar a presença de organismos semelhantes a Helicobacter e as alterações endoscópicas e histopatológicas em estômago de gatos domésticos de sangue tipo A. Amostras de antro, corpo e fundo gástricos foram coletadas de 32 gatos, sem raça definida, não domiciliados através de gastroscopia. Teste de urease e análise citológica foram realizados em amostras frescas. Secções teciduais foram processadas e coradas com hematoxilina e eosina e pela prata pelo método de Warthin-Starry para avaliação histológica. Helicobacter spp. foi detectado em 100% das amostras submetidas às análises citológicas e coloração pela prata e em 96,9% das amostras submetidas ao teste de urease. Em 87,5% dos gatos foi identificado infiltrado inflamatório mononuclear. A graduação e distribuição do infiltrado inflamatório nestes gatos revelaram alterações leves (78,1%) a moderada (9,4%) em pelo menos uma região gástrica. Estas alterações eram independentes do escore de colonização. Hiperplasia de folículos linfoides foram detectadas em 3 gatos. Gatos do grupo sanguíneo A são frequentemente colonizados por Helicobacter spp. e os achados macro e microscópicos são consistentes com estudos em gatos domésticos realizados até a presente data. Conclui-se que o grupo sanguíneo mais comum em gatos não está associado com uma alta susceptibilidade a gastrite sintomática causada por Helicobacter spp.


#4 - Clinical, endoscopic and histopathological evaluation of dogs with inflammatory bowel disease, 37(11):1287-1291

Abstract in English:

ABSTRACT.- Cascon C.M., Mello M.F.V., Leite J.S. & Ferreira A.M.R. 2017. [Clinical, endoscopic and histopathological evaluation of dogs with inflammatory bowel disease.] Avaliação clínica, endoscópica e histopatológica de cães com doença inflamatória intestinal. Pesquisa Veterinária Brasileira 37(11):1287-1291. Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil 64, Niterói, RJ 24230-340, Brazil. E-mail: anatopatovet@vm.uff.br The aim of this study was to evaluate macro and microscopic gastrointestinal mucosa of domiciled dogs, with chronic gastrointestinal symptoms by endoscopy and histopathological evaluation, correlating clinical signs, macro and microscopy characteristics/aspects/changes of duodenal and gastric mucosa. Twenty dogs of different breeds were evaluated with with chronic characteristic signs of Inflammatory Bowel Disease (IBD), being 7 males and 13 females, with ages ranging from 1.7 to 15.8 years old. The study was prospective and cross-sectional, conducted in dogs treated at the Teaching Veterinary Medicine Hospital of the Universidade Federal Fluminense (HUVET-UFF) and private clinics in the city of Rio de Janeiro. Gastroduodenal mucosal samples were obtained by endoscopic biopsy and were processed by routine histological technique and stained with hematoxylin- eosin and Giemsa. The samples were submitted to histopathological analysis for the detection of spiral bacteria suggestive of Helicobacter spp. The rapid urease test was also performed. The clinical signs, the macro and microscopic findings were compared and correlated. In this study, we established a positive correlation between weight loss and the presence of erythema in the antrum, body and duodenum as well as correlation between change in appetite and the presence of gastric inflammatory infiltrate and positivity in the urease test. This study demonstrated the importance of the observation of some clinical signs such as weight loss and appetite changes in the course of IBD. Thus, it is emphasized that dogs showing these clinical signs should have the IBD included in the differential diagnoses group avoiding thereby neglecting a disease that increasingly affects small animals.

Abstract in Portuguese:

RESUMO.- Cascon C.M., Mello M.F.V., Leite J.S. & Ferreira A.M.R. 2017. [Clinical, endoscopic and histopathological evaluation of dogs with inflammatory bowel disease.] Avaliação clínica, endoscópica e histopatológica de cães com doença inflamatória intestinal. Pesquisa Veterinária Brasileira 37(11):1287-1291. Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil 64, Niterói, RJ 24230-340, Brazil. E-mail: anatopatovet@vm.uff.br O presente estudo teve como objetivo avaliar macro e microscopicamente a mucosa gastrintestinal de cães domiciliados, que apresentaram sinais gastrintestinais crônicos, por meio de exame endoscópico e da avaliação histopatológica. Os sinais clínicos, a macro e a microscopia das mucosas gástrica e duodenal foram correlacionados. Foram avaliados 20 cães de diferentes raças, sendo 7 machos e 13 fêmeas, com idade variando entre 1,7 a 15,8 anos, que apresentavam cronicidade dos sinais característicos da Doença Inflamatória Intestinal (DII). O estudo foi prospectivo e transversal, realizado em cães atendidos no Hospital Universitário de Medicina Veterinária da Universidade Federal Fluminense (HUVET - UFF) e em clínicas privadas do município do Rio de Janeiro. Amostras de mucosa gastroduodenal foram obtidas por meio de biópsia endoscópica e foram processadas por técnica histológica de rotina e coradas por Hematoxilina-Eosina e Giemsa. As amostras foram submetidas à análise histopatológica para pesquisa de bactérias espiraladas sugestivas de Helicobacter spp. O teste rápido da urease também foi realizado. Os sinais clínicos, e os achados macro e microscópicos foram confrontados e correlacionados. Neste estudo, foi possível estabelecer correlação positiva entre a perda de peso e a presença de enantema no antro, no corpo e no duodeno além de correlação entre alteração do apetite, a presença de infiltrado inflamatório gástrico e a positividade no teste da urease. Este estudo demonstrou a importância da observação de alguns sinais clínicos como a perda de peso e alterações do apetite no curso da Doença Inflamatória Intestinal. Desta forma, enfatiza-se que cães que apresentem tais sinais clínicos devem ter a Doença Inflamatória Intestinal incluída no grupo de diagnósticos diferenciais evitando, com isso, negligenciar uma enfermidade que, cada vez mais, acomete animais de pequeno porte.


Colégio Brasileiro de Patologia Animal SciELO Brasil CAPES CNPQ UNB UFRRJ CFMV