Epididymal primary mast cell tumor in a dog

Background: In the literature, there are a few descriptions of epididymis neoplasia in domestic animals, especially considering primary tumors. In the few reports found in literature, the lesions were a consequence of the invasion of testicular or paratesticular neoplasia, as a papillar carcinoma in a dog's and a bull's epididymis, and mesenchymal tumors - fibrome/ fibrosarcoma, leiomyoma/leiosarcome. On the other hand, mast cell tumors are the second most prevalent neoplasia in dogs in Brazil, affecting especially the skin. The aim of this report is to describe for the first time a low malignancy mast cell tumor in a mixed-breed dog's epididymis, without metastasis or recurrence in a 2-year follow-up period. Case: A 10-year-old male mixed-breed dog was presented for pre-surgical evaluation for elective orchiectomy. In the physical examination, an increase in the volume of approximately 2 cm with an irregular appearance was identified on palpation in the cranial pole of the left testis. In the trans surgical period, an increase in testicular volume (4 cm long x 2 cm wide) was observed, with a firm consistency in the region of the vas deferens with macroscopic changes in the region. The testis was sectioned, and the fragments were sent for histopathological evaluation in 10% buffered formaldehyde. There was a fairly cellular circumscribed neoplastic infiltrate, distributed in a sheet and separated by fibrovascular stroma, and rounded neoplastic cells with a moderate amount of basophilic cytoplasmic granulation, and discrete anisocytosis and anisokaryosis. The nuclei were rounded with vesicular chromatin with 1 or 2 distinct nucleoli. No mitosis figures were observed in 10 high power fields (400x). Few eosinophils were distributed throughout the neoplastic cell population. Immunohistochemistry demonstrated immunostaining for KIT protein with perimembranous staining in 95% of neoplastic mast cells, giving a KIT 1 pattern. There was no positive nuclear staining for Ki67 in any cell of the histological sections examined. A grade II mast cell tumor (low grade of malignancy) was diagnosed. After diagnosis, the animal underwent radiographic evaluation of the chest and abdominal ultrasound, and a new physical inspection in search of nodules, plaques, skin lesions, or subcutaneous masses. There were no metastases in the thorax and abdominal cavity, nor physical alterations, and it can be inferred that the epididymis was the primary site of the mast cell tumor. After 2 years of orchiectomy, there were no recurrences, and no chemotherapy treatment was performed. Discussion: Extracutaneous mast cell tumors are uncommon in animals, but have been reported in oral and nasal mucosa, nasopharynx, larynx, trachea, intestine, visceral lymph nodes, spleen, liver, spinal cord, intestine, ureter, conjunctiva, lung and more recently in tear gland of the third eyelid. However, in the authors' assessment, this is the first description of mast cell tumor in the epididymis in dogs. The diagnosis was established by histopathological examination, which revealed a grade II epididymal mast cell tumor and immunohistochemical evaluation (KIT and Ki-67) as being of low aggressiveness. The diagnosis of a primary tumor was confirmed since the staging was established after the histopathological diagnosis, involving chest radiography, abdominal ultrasound, cutaneous evaluation in search of nodules, plaques, cutaneous and subcutaneous lesions, and did not reveal other abnormalities or metastases not identified in the preoperative evaluation. In addition, immunostaining with KIT and Ki-67 reaffirmed the low degree of malignancy and the potential for metastases, which can be observed by the asymptomatic follow-up of the patient 2 years after the surgical excision.

Caveolin-1, GATA-3, and Ki67 expressions and their correlation with pathological findings in canine bladder urothelial carcinoma.

The bladder urothelial carcinoma (UC) represents ~2% of malignant neoplasms in dogs and is a therapeutic challenge in veterinary medicine. Although it is considered the most common bladder cancer in dogs, few previous studies have investigated different markers that correlate with clinical and pathological parameters. Therefore, this study aimed to evaluate Caveolin-1, GATA-3, and Ki67 immunostaining in canine UC samples to evaluate their correlations with histopathological variables. Thirty tumor samples were obtained, and Caveolin-1, GATA-3, and Ki67 expression was assessed by immunohistochemistry and associated with pathological factors by univariate and multivariate analyses. Among the histopathological findings, lymphatic invasion was identified in 53.33% of the tumors, and the mean mitotic count (MC) was 31.82 ± 26.26. Caveolin-1 showed mild-to-high cytoplasmic expression in neoplastic cells, whereas GATA-3 showed mild-to-high nuclear expression. The Ki67 expression revealed a mean of 24.14 ± 16.88% positive cells. In the univariate analysis, no association was found between each marker and the pathological findings. On the other hand, in multivariate analysis, we identified a positive correlation between GATA-3 and MC and a negative correlation between Caveolin-1 and MC. Moreover, lymphatic invasion was positively correlated with histological type and grade, and negatively correlated with MC. In addition, the histological type was positively correlated with the histological grade. Overall, our results indicate that Caveolin-1 and GATA-3 expression could be promising markers for bladder UC aggressiveness.

Immunopathological findings in a cat with auricular chondritis.

At clinical examination, a 5-year-old male domestic short-haired cat exhibited painful swelling and erythema of the pinnae of both ears. Microscopically, the lesions on both pinnae were composed of diffuse granulomatous chondritis with degeneration and necrosis of the pinnal cartilage. Numerous mast cells were also observed within and surrounding the inflammatory lesion. Immunohistochemistry showed a mixed inflammatory infiltrate characterised by the predominance of macrophages (CD68+, MAC 387+ and Lysozyme+), T lymphocytes (CD3+), some B lymphocytes (CD79α+) and neutrophils. Immunopathological characterisation of the lesion showed a granulomatous inflammation profile and suggests that the morphological changes and immunopathogenesis of auricular chondritis in cats presents a similarity with relapsing polychondritis in humans.

Ki67/KIT double immunohistochemical staining in cutaneous mast cell tumors from Boxer dogs.

Cutaneous mast cell tumors (MCTs) are among the most frequent malignant tumors in dogs and Boxer breed dogs have a higher incidence of this disease. Ki67 staining and KIT staining are widely used to predict natural behavior in canine MCT but no previous study has evaluated double staining of these proteins as a prognostic factor. Based on biological behavior predictors in canine MCT, the purpose of this study was to determine the Ki67 proliferative index in KIT positive cells using double stain immunohistochemistry technique. Sixty-nine MCTs from Boxer dogs were selected and a tissue microarray was constructed for the double stained immunohistochemistry. Double positivity (Ki67(+)/KIT(+)) was observed in 20/69 (29%) MCT, with a mean of 9.06 double positive cells per tissue core (range 0.48%-43.97%) and Ki67(-)/KIT(+) animals had a longer survival time than Ki67(+)/KIT(+) animals (p=0.03).

Relação da expressão de fatores de crescimento celular (IGF-1) e (SCF) com fatores prognósticos e o alvo da rapamicina em mamíferos (m-TOR) em mastocitomas cutâneos caninos / IGF-1 and SCF protein expression in cutaneous mast cell tumors in dogs and relation to prognostic factors and mammalian target of rapamycin (m-TOR)

O mastocitoma cutâneo (MTC) é a neoplasia maligna mais comum na pele dos cães e seu comportamento biológico é muito variável. Dentre os fatores prognósticos estudados nos MTCs, a classificação histopatológica, o índice proliferativo e o padrão de expressão doc-KIT são os que apresentam uma associação mais relevante com o provável prognóstico deste tumor. O objetivo deste trabalho foi avaliar a expressão proteica de fator de crescimento semelhante à insulina tipo 1 (IGF-1), fator de célula tronco (SCF) e sua relação com o receptor tirosina quinase (c-KIT), alvo da rapamicina em mamíferos (m-TOR), grau histológico, índice proliferativo pelo KI-67e o número de figuras de mitose (IM) com dados clínicos de cães com MTCs . Foram utilizadas 133 amostras de MTCs, provenientes de 133 cães, dispostas em lâminas de microarranjo de tecidos (TMA). A técnica de imuno-histoquímica foi utilizada para a avaliação destas proteínas. Observou-se associação entre SCF e, a graduação histopatológica proposta em 2011, índice mitótico, proliferação celular (KI-67), escore de IGF-1, local da lesão, idade dos animais e padrão imuno-histoquímico do receptor c-KIT. A relação de dependência também foi observada entre IGF-1 e o porte dos animais, IM, m-TOR e c-KIT. A expressão de SCF teve relacção com a agressividade dos MTCs caninos, uma vez que foi mais freqüente em MTCs com c-KIT citoplasmático. A relação entre a expressão de IGF-1, SCF, c-KIT e m-TOR pode estar associada à integralização de suas vias de ação. A expressão de IGF-1 está associada à MTCs em cães de porte grande.(AU)

Cutaneous mast cell tumor (MCT) is one of the most common neoplasms in the skin of dogs and express variable biological behavior. Among the MTC aspects studied, histological classification, proliferative index and protein expression of c-KIT show the most defined connection with the tumor prognostic. The aim of this study was to evaluate the protein expression of insulin-like growth factor type 1 (IGF-1), steam cell factor (SCF) and theit relationship with tyrosine kinase receptor (c-KIT), mammalian target of rapamycin (m-TOR), histological classification (KI-67), proliferative and mitotic index and epidemiological data in MTCs. In this study 133 MTC samples from 133 animals were used, arranged in tissue microarray (TMA) slides. The TMA was used for evaluation the proteins. An association was observed between SCF and histological grade proposed in 2011, mitotic index, cell proliferation, IGF-1, lesion site, age of the animals, and immunohistochemical pattern c-KIT receptor. The dependence relationship was also observed between IGF-1 and animal size, mitotic index, m-TOR and c-KIT. The SCF protein expression was related to canine MTCs aggressiveness, since it is more frequent in MCTs with c-KIT cytoplasmic. The relationship between the expression of IGF-1, SCF, c-KIT e m-TOR can be associated with the integration of its actions ways. The IGF-1 expression is associated with large dog breeds MTCs.(AU)

Relação da expressão de fatores de crescimento celular (IGF-1) e (SCF) com fatores prognósticos e o alvo da rapamicina em mamíferos (m-TOR) em mastocitomas cutâneos caninos / IGF-1 and SCF protein expression in cutaneous mast cell tumors in dogs and relation to prognostic factors and mammalian target of rapamycin (m-TOR)

O mastocitoma cutâneo (MTC) é a neoplasia maligna mais comum na pele dos cães e seu comportamento biológico é muito variável. Dentre os fatores prognósticos estudados nos MTCs, a classificação histopatológica, o índice proliferativo e o padrão de expressão doc-KIT são os que apresentam uma associação mais relevante com o provável prognóstico deste tumor. O objetivo deste trabalho foi avaliar a expressão proteica de fator de crescimento semelhante à insulina tipo 1 (IGF-1), fator de célula tronco (SCF) e sua relação com o receptor tirosina quinase (c-KIT), alvo da rapamicina em mamíferos (m-TOR), grau histológico, índice proliferativo pelo KI-67e o número de figuras de mitose (IM) com dados clínicos de cães com MTCs . Foram utilizadas 133 amostras de MTCs, provenientes de 133 cães, dispostas em lâminas de microarranjo de tecidos (TMA). A técnica de imuno-histoquímica foi utilizada para a avaliação destas proteínas. Observou-se associação entre SCF e, a graduação histopatológica proposta em 2011, índice mitótico, proliferação celular (KI-67), escore de IGF-1, local da lesão, idade dos animais e padrão imuno-histoquímico do receptor c-KIT. A relação de dependência também foi observada entre IGF-1 e o porte dos animais, IM, m-TOR e c-KIT. A expressão de SCF teve relacção com a agressividade dos MTCs caninos, uma vez que foi mais freqüente em MTCs com c-KIT citoplasmático. A relação entre a expressão de IGF-1, SCF, c-KIT e m-TOR pode estar associada à integralização de suas vias de ação. A expressão de IGF-1 está associada à MTCs em cães de porte grande.

Cutaneous mast cell tumor (MCT) is one of the most common neoplasms in the skin of dogs and express variable biological behavior. Among the MTC aspects studied, histological classification, proliferative index and protein expression of c-KIT show the most defined connection with the tumor prognostic. The aim of this study was to evaluate the protein expression of insulin-like growth factor type 1 (IGF-1), steam cell factor (SCF) and theit relationship with tyrosine kinase receptor (c-KIT), mammalian target of rapamycin (m-TOR), histological classification (KI-67), proliferative and mitotic index and epidemiological data in MTCs. In this study 133 MTC samples from 133 animals were used, arranged in tissue microarray (TMA) slides. The TMA was used for evaluation the proteins. An association was observed between SCF and histological grade proposed in 2011, mitotic index, cell proliferation, IGF-1, lesion site, age of the animals, and immunohistochemical pattern c-KIT receptor. The dependence relationship was also observed between IGF-1 and animal size, mitotic index, m-TOR and c-KIT. The SCF protein expression was related to canine MTCs aggressiveness, since it is more frequent in MCTs with c-KIT cytoplasmic. The relationship between the expression of IGF-1, SCF, c-KIT e m-TOR can be associated with the integration of its actions ways. The IGF-1 expression is associated with large dog breeds MTCs.

Aurotriquia adquirida em um canino da raça schnauzer / Acquired aurotriquia in a schnauzer dog

Alterações adquiridas na coloração da pelagem de cães são raras. Schnauzers miniaturas podem apresentar desenvolvimento idiopático de coloração dourada do pelame, primariamente do tronco, chamada de aurotriquia. O presente trabalho relata a ocorrência de aurotriquia em um cão da raça schnauzer, de três anos de idade, sendo esse o primeiro relato de caso de aurotriquia em schnauzer no Brasil. Por se tratar de alteração de rara ocorrência, torna-se necessária maior atenção a características raciais e um melhor exame físico e anamnese, mesmo se tratando de alteração considerada meramente de fenótipo, pois existem as alterações de coloração bem piores, ligadas a doenças de prognóstico.

Coat color changes in adult dogs are rare. Miniature schnauzers can development golden hair coat color, primarily in the trunk, called aurotriquia. This paper reports the occurrence of aurotriquia in a schnauzer, three years old, being this the first case report of aurotriquia schnauzer in Brazil. Due to its rare occurrence there is a need for greater attention to racial characteristics and a better physical examination and medical history, Despite, being only a change in the phenotype, there are color changes related to worse disease prognosis.

Aurotriquia adquirida em um canino da raça schnauzer

Coat color changes in adult dogs are rare. Miniature schnauzers can development golden hair coat color, primarily in the trunk, called aurotriquia. This paper reports the occurrence of aurotriquia in a schnauzer, three years old, being this the first case report of aurotriquia schnauzer in Brazil. Due to its rare occurrence there is a need for greater attention to racial characteristics and a better physical examination and medical history, Despite, being only a change in the phenotype, there are color changes related to worse disease prognosis.

Alterações adquiridas na coloração da pelagem de cães são raras. Schnauzers miniaturas podem apresentar desenvolvimento idiopático de coloração dourada do pelame, primariamente do tronco, chamada de aurotriquia. O presente trabalho relata a ocorrência de aurotriquia em um cão da raça schnauzer, de três anos de idade, sendo esse o primeiro relato de caso de aurotriquia em schnauzer no Brasil. Por se tratar de alteração de rara ocorrência, torna-se necessária maior atenção a características raciais e um melhor exame físico e anamnese, mesmo se tratando de alteração considerada meramente de fenótipo, pois existem as alterações de coloração bem piores, ligadas a doenças de prognóstico.

Aurotriquia adquirida em um canino da raça schnauzer

Coat color changes in adult dogs are rare. Miniature schnauzers can development golden hair coat color, primarily in the trunk, called aurotriquia. This paper reports the occurrence of aurotriquia in a schnauzer, three years old, being this the first case report of aurotriquia schnauzer in Brazil. Due to its rare occurrence there is a need for greater attention to racial characteristics and a better physical examination and medical history, Despite, being only a change in the phenotype, there are color changes related to worse disease prognosis.

Alterações adquiridas na coloração da pelagem de cães são raras. Schnauzers miniaturas podem apresentar desenvolvimento idiopático de coloração dourada do pelame, primariamente do tronco, chamada de aurotriquia. O presente trabalho relata a ocorrência de aurotriquia em um cão da raça schnauzer, de três anos de idade, sendo esse o primeiro relato de caso de aurotriquia em schnauzer no Brasil. Por se tratar de alteração de rara ocorrência, torna-se necessária maior atenção a características raciais e um melhor exame físico e anamnese, mesmo se tratando de alteração considerada meramente de fenótipo, pois existem as alterações de coloração bem piores, ligadas a doenças de prognóstico.

Aurotriquia adquirida em um canino da raça schnauzer

Coat color changes in adult dogs are rare. Miniature schnauzers can development golden hair coat color, primarily in the trunk, called aurotriquia. This paper reports the occurrence of aurotriquia in a schnauzer, three years old, being this the first case report of aurotriquia schnauzer in Brazil. Due to its rare occurrence there is a need for greater attention to racial characteristics and a better physical examination and medical history, Despite, being only a change in the phenotype, there are color changes related to worse disease prognosis.

Alterações adquiridas na coloração da pelagem de cães são raras. Schnauzers miniaturas podem apresentar desenvolvimento idiopático de coloração dourada do pelame, primariamente do tronco, chamada de aurotriquia. O presente trabalho relata a ocorrência de aurotriquia em um cão da raça schnauzer, de três anos de idade, sendo esse o primeiro relato de caso de aurotriquia em schnauzer no Brasil. Por se tratar de alteração de rara ocorrência, torna-se necessária maior atenção a características raciais e um melhor exame físico e anamnese, mesmo se tratando de alteração considerada meramente de fenótipo, pois existem as alterações de coloração bem piores, ligadas a doenças de prognóstico.

Cytoplasmic and nuclear morphometric parameters in cytologic preparations of canine cutaneous mast cell tumors

Thirty fine-needle biopsy (FNB) samples from 28 dogs subjected to surgical resection of cutaneous mast cell tumors (MCTs) were stained with Giemsa. At least 100 neoplastic cells from each cytology slide were evaluated by morphometric analysis. The parameters were: area, perimeter of the cell, cytoplasm, nucleus and circumference factor.MCTs of grade III had a mean cellular area of 231.70 µm2 ± 57.1, and grade II had a mean of 252.30 µm2 ± 55.0.Cellular perimeter was 61.20 ± 7.1 in grade II and 59.1 ± 8.6 in grade III. Cellular parameters were not statistically different between grades (p> .05). Mean nuclear area was 88.90 µm2 ± 19 in grade III and 72.30 µm2 ± 13.9 in grade II, with statistical difference between grades (P = .011). Mean nuclear perimeter was 32.40 µm ± 3.0 in grade II and 35.70 µm ± 4.0 in grade III, with statistical difference between grades (P = .018). Mean nuclear circumference factor was 1.0 ± 0.33 in grade II and 1.1 ± 0.28 in grade III, with no statistical difference between grades (P = 0.78). Nuclear-tocytoplasmic ratio in grade II was 0.29 ± .07 and 0.39 ± .08 in grade III, with statistical difference (P = .02). The number of binucleated and multinucleated cells and mitotic figures was significantly increased in grade III MCTs (P < .001). In conclusion, the number of mitotic figures, presence of binucleation and multinucleation, and nuclear-to-cytoplasmic ratio can help to guide a profile of MCT aggressiveness in cytologic preparations.(AU)

Cytoplasmic and nuclear morphometric parameters in cytologic preparations of canine cutaneous mast cell tumors

Thirty fine-needle biopsy (FNB) samples from 28 dogs subjected to surgical resection of cutaneous mast cell tumors (MCTs) were stained with Giemsa. At least 100 neoplastic cells from each cytology slide were evaluated by morphometric analysis. The parameters were: area, perimeter of the cell, cytoplasm, nucleus and circumference factor.MCTs of grade III had a mean cellular area of 231.70 µm2 ± 57.1, and grade II had a mean of 252.30 µm2 ± 55.0.Cellular perimeter was 61.20 ± 7.1 in grade II and 59.1 ± 8.6 in grade III. Cellular parameters were not statistically different between grades (p> .05). Mean nuclear area was 88.90 µm2 ± 19 in grade III and 72.30 µm2 ± 13.9 in grade II, with statistical difference between grades (P = .011). Mean nuclear perimeter was 32.40 µm ± 3.0 in grade II and 35.70 µm ± 4.0 in grade III, with statistical difference between grades (P = .018). Mean nuclear circumference factor was 1.0 ± 0.33 in grade II and 1.1 ± 0.28 in grade III, with no statistical difference between grades (P = 0.78). Nuclear-tocytoplasmic ratio in grade II was 0.29 ± .07 and 0.39 ± .08 in grade III, with statistical difference (P = .02). The number of binucleated and multinucleated cells and mitotic figures was significantly increased in grade III MCTs (P < .001). In conclusion, the number of mitotic figures, presence of binucleation and multinucleation, and nuclear-to-cytoplasmic ratio can help to guide a profile of MCT aggressiveness in cytologic preparations.

Correlação da cicloxigenase-2 e p53 com gradação histopatológica dos mastocitomas cutâneos caninos / Cyclooxygenase-2 and p53 correlation with histopathological grade in cutaneous mast cell tumors

O mastocitoma cutâneo canino é uma neoplasia observada na clínica de animais de companhia de grande importância devido a sua alta freqüência, comportamento clínico agressivo e dificuldade de excisão cirúrgica com margens seguras. De todos os métodos de classificação de masteocitomas e estabelecimento do prognóstico, a gradação histopatológica parece ser a de maior consistência preditiva. No entanto, o comportamento clínico de mastocitomas continua imprevisível e técnicas que auxiliem na determinação do prognóstico são necessárias. Foi realizado estudo retrospectivo baseado nos livros de registro do serviço de Patologia Veterinária da faculdade de Medicina Veterinária e Zootencia UNESP, Botucatu, para seleção dos casos com diagnóstico de mastocitoma cutâneo canino, que foram graduados na histopatologia e submetidos a técnica imunoistoquímica para os anticorpos primários anti-p53 mutante e anti-COX2. Não foram observadas diferenças estatísticas entre os valores desses biomarcadores e a gradação histopatológicas, porém todos os graus de mastocitoma apresentaram elevados níveis de COX-2 e p-53 (maiores que 50%) o que corrobora com o comportamento biológico potencialmente maligno dessa neoplasia(AU)

Mast cell tumor is a frequent neoplasia in small animal clinic, and it is very important due its high frequency, aggressive clinical behavior and difficult surgical excision with safe margins. Of all grading methods and prognostic establishment, the histopathological grading is the most confident for predicting the prognosis. Furthermore, the mast cell tumors present an unpredictable clinical behavior and new prognostic tools should be used to identify patients with higher risk of metastasis and death. A restropective study was made using the Pathology Service (from FMVZ, Unesp, Botucatu, SP) register book to select the mast cell tumors, that were graduated eccording to Patnaik et al. (2) and immunohistochemistry technique was applied for p-53 and COX-2 primary antibodies. No statistical differences were seen in both antibodies used and the hispothological grade, but all tumors had more than 50% of the neoplastic cells positive for each antibody, whinch in agreement with the potential malignant behavior of this neoplasia(AU)

Correlação da cicloxigenase-2 e p53 com gradação histopatológica dos mastocitomas cutâneos caninos / Cyclooxygenase-2 and p53 correlation with histopathological grade in cutaneous mast cell tumors

O mastocitoma cutâneo canino é uma neoplasia observada na clínica de animais de companhia de grande importância devido a sua alta freqüência, comportamento clínico agressivo e dificuldade de excisão cirúrgica com margens seguras. De todos os métodos de classificação de masteocitomas e estabelecimento do prognóstico, a gradação histopatológica parece ser a de maior consistência preditiva. No entanto, o comportamento clínico de mastocitomas continua imprevisível e técnicas que auxiliem na determinação do prognóstico são necessárias. Foi realizado estudo retrospectivo baseado nos livros de registro do serviço de Patologia Veterinária da faculdade de Medicina Veterinária e Zootencia – UNESP, Botucatu, para seleção dos casos com diagnóstico de mastocitoma cutâneo canino, que foram graduados na histopatologia e submetidos a técnica imunoistoquímica para os anticorpos primários anti-p53 mutante e anti-COX2. Não foram observadas diferenças estatísticas entre os valores desses biomarcadores e a gradação histopatológicas, porém todos os graus de mastocitoma apresentaram elevados níveis de COX-2 e p-53 (maiores que 50%) o que corrobora com o comportamento biológico potencialmente maligno dessa neoplasia

Mast cell tumor is a frequent neoplasia in small animal clinic, and it is very important due its high frequency, aggressive clinical behavior and difficult surgical excision with safe margins. Of all grading methods and prognostic establishment, the histopathological grading is the most confident for predicting the prognosis. Furthermore, the mast cell tumors present an unpredictable clinical behavior and new prognostic tools should be used to identify patients with higher risk of metastasis and death. A restropective study was made using the Pathology Service (from FMVZ, Unesp, Botucatu, SP) register book to select the mast cell tumors, that were graduated eccording to Patnaik et al. (2) and immunohistochemistry technique was applied for p-53 and COX-2 primary antibodies. No statistical differences were seen in both antibodies used and the hispothological grade, but all tumors had more than 50% of the neoplastic cells positive for each antibody, whinch in agreement with the potential malignant behavior of this neoplasia

Expression of CD3 and CD79a cell markers in exfoliative and ulcerative skin lesions in dogs with leishmaniasis / Imunomarcação de células CD3+ e CD79a+ nas lesões descamativas e ulcerativas de cães com leishmaniose

Canine visceral leishmaniasis is an endemic infectious disease in some regions from São Paulo state and even though it is a systemic disease, in the dog, the main clinical sign is dermatological. Thirty dogs with positive results in serology (IFI) and parasitological exams (fine needle aspiration) for leishmaniasis from Araçatuba city were evaluated. They only showed dermatological signs and were divided in two groups, one with exfoliative (n=15) and other with ulcerative (n=15) lesions. There was significant statistical difference between CD3 and CD79a population in the same dermatological pattern, and with CD79a population between exfoliative and ulcerative patterns (p 0,05).

A leishmaniose visceral canina é uma doença infecciosa crônica considerada endêmica em algumas regiões do estado de São Paulo e, apesar de ser uma enfermidade sistêmica, no cão, a maioria dos sinais clínicos são dermatológicos. Foram avaliados trinta cães com diagnóstico de leishmaniose, da região de Araçatuba, pelos exames parasitológico (punção aspirativa por agulha fina de linfonodos) e sorologia (IFI). Os cães apresentando unicamente sinais dermatológicos formam divididos em dois grupos: um grupo com descamação e outro com ulceração. Houve diferença estatística entre a população de células CD3+ e CD79a+ dentro do mesmo padrão dermatológico, o mesmo ocorreu com a população de CD79a+ entre os padrões descamativo e ulcerativo (p 0,05 ).

Histopathological pattern of exfoliative and ulcerative skin lesions in dogs with leishmaniasis / Padrões histopatológicos das lesões descamativas e ulcerativas da pele em cães com leishmaniose

Canine visceral leishmaniasis is an endemic infectious disease in some São Paulo state regions and even though it is a systemic disease, in the dog, the main clinical sign is dermatological. Thirty dogs with positive results in serology and parasitological exams for leishmaniasis from Araçatuba city were evaluated. They just showed dermatological signs and were divided in two groups, one with exfoliative (n=1 ) and other with ulcerative (n=1 ) lesions. Histopathological patterns in the group of exfoliative lesions were: periadnexial dermatitis (5/15, 33,3%), superficial perivascular dermatitis (1/15, 6,6%), nodular dermatitis (1/1 , , %) and mixed dermatitis (8/1 , , %), including intersticial/periadnexial dermatitis (1/8, 12,5%), lichenoid/perivascular superficial and deep dermatitis (1/8, 12,5%), perivascular superficial and deep/periadnexial dermatitis (1/8, 12,5%) and superficial perivascular/perianexial dermatitis ( /8, , %). In the group of ulcerative lesions, the histopathological patterns were: perivascular superficial and deep dermatitis (5/15, 33,3%), diffuse dermatitis (3/15, 20%), periadnexial dermatitis ( /1 , 1 , %), nodular dermatitis (1/1 , , %) and mixed dermatitis ( /1 , , %), including intersticial/ perivascular superficial and deep dermatitis (1/4, 25%), nodular/periadnexial dermatitis (1/4, 25%), fibrosing/perianexial dermatitis (1/4, 25%) and perivascular

A leishmaniose visceral canina é uma doença infecciosa crônica considerada endêmica em algumas regiões do estado de São Paulo e, apesar de ser uma enfermidade sistêmica, no cão, a maioria dos sinais clínicos são dermatológicos. Foram avaliados trinta cães com diagnóstico de leishmaniose, da região de Araçatuba, pelos exames parasitológico e sorológico. Os cães apresentando apenas sinais dermatológicos foram divididos em dois grupos: um grupo com descamação e outro com ulceração. Os padrões histopatológicos da pele encontrados nos cães com lesões descamativas (n=15) foram de dermatite perianexial (5/15, 33,3%), dermatite perivascular superficial (1/15, 6,6%), dermatite nodular (1/15, 6,6%), e dentre as dermatites mistas (8/15, 53,3%), dermatite intersticial/perianexial (1/8, 12,5%), dermatite liquenóide/perivascular superficial e profunda (1/8, 12,5%), dermatite perivascular superficial e profunda/perianexial (1/8, 12,5%) e dermatite perivascular superficial/perianexial (5/8, 62,5%). Os cães com lesões ulcerativas (n=15) apresentaram padrões histopatológicos de dermatite perivascular superficial e profunda (5/15, 33,3%), dermatite difusa (3/15, 20%), dermatite perianexial (2/15, 13,3%), dermatite nodular (1/15, 6,6%), e dentre as dermatites mistas (4/15, 26,6%), dermatite intersticial/perivascular superficial e profunda (1/4, 25%), dermatite nodular/perianexial (1/4, 25%), derma

Expression of CD3 and CD79a cell markers in exfoliative and ulcerative skin lesions in dogs with leishmaniasis / Imunomarcação de células CD3+ e CD79a+ nas lesões descamativas e ulcerativas de cães com leishmaniose

Canine visceral leishmaniasis is an endemic infectious disease in some regions from São Paulo state and even though it is a systemic disease, in the dog, the main clinical sign is dermatological. Thirty dogs with positive results in serology (IFI) and parasitological exams (fine needle aspiration) for leishmaniasis from Araçatuba city were evaluated. They only showed dermatological signs and were divided in two groups, one with exfoliative (n=15) and other with ulcerative (n=15) lesions. There was significant statistical difference between CD3 and CD79a population in the same dermatological pattern, and with CD79a population between exfoliative and ulcerative patterns (p 0,05).

A leishmaniose visceral canina é uma doença infecciosa crônica considerada endêmica em algumas regiões do estado de São Paulo e, apesar de ser uma enfermidade sistêmica, no cão, a maioria dos sinais clínicos são dermatológicos. Foram avaliados trinta cães com diagnóstico de leishmaniose, da região de Araçatuba, pelos exames parasitológico (punção aspirativa por agulha fina de linfonodos) e sorologia (IFI). Os cães apresentando unicamente sinais dermatológicos formam divididos em dois grupos: um grupo com descamação e outro com ulceração. Houve diferença estatística entre a população de células CD3+ e CD79a+ dentro do mesmo padrão dermatológico, o mesmo ocorreu com a população de CD79a+ entre os padrões descamativo e ulcerativo (p 0,05 ).

Histopathological pattern of exfoliative and ulcerative skin lesions in dogs with leishmaniasis / Padrões histopatológicos das lesões descamativas e ulcerativas da pele em cães com leishmaniose

Canine visceral leishmaniasis is an endemic infectious disease in some São Paulo state regions and even though it is a systemic disease, in the dog, the main clinical sign is dermatological. Thirty dogs with positive results in serology and parasitological exams for leishmaniasis from Araçatuba city were evaluated. They just showed dermatological signs and were divided in two groups, one with exfoliative (n=1 ) and other with ulcerative (n=1 ) lesions. Histopathological patterns in the group of exfoliative lesions were: periadnexial dermatitis (5/15, 33,3%), superficial perivascular dermatitis (1/15, 6,6%), nodular dermatitis (1/1 , , %) and mixed dermatitis (8/1 , , %), including intersticial/periadnexial dermatitis (1/8, 12,5%), lichenoid/perivascular superficial and deep dermatitis (1/8, 12,5%), perivascular superficial and deep/periadnexial dermatitis (1/8, 12,5%) and superficial perivascular/perianexial dermatitis ( /8, , %). In the group of ulcerative lesions, the histopathological patterns were: perivascular superficial and deep dermatitis (5/15, 33,3%), diffuse dermatitis (3/15, 20%), periadnexial dermatitis ( /1 , 1 , %), nodular dermatitis (1/1 , , %) and mixed dermatitis ( /1 , , %), including intersticial/ perivascular superficial and deep dermatitis (1/4, 25%), nodular/periadnexial dermatitis (1/4, 25%), fibrosing/perianexial dermatitis (1/4, 25%) and perivascular

A leishmaniose visceral canina é uma doença infecciosa crônica considerada endêmica em algumas regiões do estado de São Paulo e, apesar de ser uma enfermidade sistêmica, no cão, a maioria dos sinais clínicos são dermatológicos. Foram avaliados trinta cães com diagnóstico de leishmaniose, da região de Araçatuba, pelos exames parasitológico e sorológico. Os cães apresentando apenas sinais dermatológicos foram divididos em dois grupos: um grupo com descamação e outro com ulceração. Os padrões histopatológicos da pele encontrados nos cães com lesões descamativas (n=15) foram de dermatite perianexial (5/15, 33,3%), dermatite perivascular superficial (1/15, 6,6%), dermatite nodular (1/15, 6,6%), e dentre as dermatites mistas (8/15, 53,3%), dermatite intersticial/perianexial (1/8, 12,5%), dermatite liquenóide/perivascular superficial e profunda (1/8, 12,5%), dermatite perivascular superficial e profunda/perianexial (1/8, 12,5%) e dermatite perivascular superficial/perianexial (5/8, 62,5%). Os cães com lesões ulcerativas (n=15) apresentaram padrões histopatológicos de dermatite perivascular superficial e profunda (5/15, 33,3%), dermatite difusa (3/15, 20%), dermatite perianexial (2/15, 13,3%), dermatite nodular (1/15, 6,6%), e dentre as dermatites mistas (4/15, 26,6%), dermatite intersticial/perivascular superficial e profunda (1/4, 25%), dermatite nodular/perianexial (1/4, 25%), derma

Tétano em um gato / Tetanus in a cat

Relata-se neste artigo o caso de tétano em um gato macho de 3 anos 8 dias após a realizaçäo de orquiectomia bilateral, onde o histórico do animal associado aos achados clínicos e laboratoriais propiciaram a definiçäo do diagnóstico. Mesmo após tratamento, o quadro evoluiu para tetania generalizada e óbito. Neste caso, a açäo da neurotoxina na musculatura estriada esquelética do esfíncter uretral foi um fator agravante para a doença, levando à retençäo vesical e azotemia pós-renal

Tetanus in a cat / Tétano em um gato

This article reports a tetanus case in a 3-year-old male cat 8 days after bilateral orchiectomy, where the animal historic associated with laboratory and clinical findings defined the diagnosis. Even after treatment, the case developed to generalized tetany and death. In this case, the neurotoxin action in skeletal striated musculature of urethral sphincter was an aggravating factor for this disease, causing retention of urinary bladder and postrenal azotaemia.

Relata-se neste artigo o caso de tétano em um gato macho de 3 anos 8 dias após a realização de orquiectomia bilateral, onde o histórico do animal associado aos achados clínicos e laboratoriais propiciaram a definição do diagnóstico. Mesmo após tratamento, o quadro evoluiu para tetania generalizada e óbito. Neste caso, a ação da neurotoxina na musculatura estriada esquelética do esfíncter uretral foi um fator agravante para a doença, levando à retenção vesical e azotemia pós-renal.