RESUMOObjetivando analisar a prevalência de TVT em relação ao sexo, raça, idade, localização da lesão e resposta ao tratamento quimioterapêutico foi realizado um estudo retrospectivo de 144 cães atendidos no Hospital Veterinário da Universidade de Uberaba (HVU) durante os anos de 2007 à 2012, diagnosticados com TVT através da realização de exames de cito ou histopatologia. Destes, 59% eram cães sem raça definida (SRD). Apesar de 16,7% dos cães avaliados não terem suas idades determinadas, os resultados desta pesquisa revelaram que os pacientes apresentaram idade variando entre 1 e 15 anos sendo a faixa etária entre 2 e 8 anos (40,2%) a mais afetada. Em relação ao sexo, este trabalho demonstrou que as fêmeas foram mais acometidas que os machos (66,7 e 33,3% respetivamente). Observou-se que a principal localização da neoplasia foi a vulva (65,3%), seguida pelo pênis (30,6%), cavidades nasal (3,5%) e oral (0,7%). Dentre os 54 cães que foram submetidos ao tratamento no hospital veterinário, 39 concluíram o protocolo, sendo que 33 apresentaram citorredução completa utilizando vincristina como agente único; 3 animais se encontravam em tratamento ao final do estudo e nos 3 casos em que houve quimiorresistência, os pacientes se beneficiaram de doxorrubicina. PALAVRAS-CHAVE: cão, doxorrubicina, vincistina. SUMMARYTo analyze the prevalence of TVT in relation to sex, breed, age, lesion location, and response to chemotherapeutic treatment, a retrospective study from 2007 to 2012 was conducted with dogs from the Veterinary Hospital of the University of Uberaba (HVU) diagnosed with TVT by cytology or histopathology. Which, 59% were mongrel dogs (59%). Although 16.7% of these dogs had their ages undetermined, the data of this study showed that patients were aged between 1 and 15 years being the range between 2 and 8 years (40.2%) the most affected. Regarding sexual predisposition, this study shows that females were more affected than males (66.7, 33.3% respectively). The primary site of the tumor occurrence was the vulva (65.3%), followed by the penis (30.6%), nasal (3.5%) and oral cavities (0.7%). Among 54 dogs that were treated at the hospital 39 dogs completed therapeutic protocol, of these 33 dogs had complete cytoreduction using the single-agent vincristine, 3 animals were still receiving treatment at the end of the study and in the 3 chemoresistance cases, these patients were benefited from doxorubicin treatment.

RESUMO.-[Método de obtenção de plasma rico em plaquetas de coelhos (Oryctolagus cuniculus).] O plasma rico em plaquetas (PRP) é um produto de fácil obtenção a baixo custo, destacando-se pelos seus fatores de crescimento na reparação tecidual. Para obtenção do PRP, a centrifugação do sangue total é realizada com tempos e forças gravitacionais específicas. Assim, o presente trabalho teve por objetivo estudar o método da dupla centrifugação para obtenção do PRP, a fim de avaliar a eficácia de aumento daMethod to obtain platelet-rich plasma from rabbits (Oryctolagus cuniculus)¹ Platelet-rich plasma (PRP) is a product easy and inxpesnsive, and stands out to for its growth factors in tissue repair. To obtain PRP, centrifugation of whole blood is made with specific time and gravitational forces. Thus, the present work aimed to study a method of double centrifugation to obtain PRP in order to evaluate the effective increase of platelet concentration in the final product, the preparation of PRP gel, and to optimize preparation time of the final sample. Fifteen female White New Zealand rabbits underwent blood sampling for the preparation of PRP. Samples were separated in two sterile tubes containing sodium citrate. Tubes were submitted to the double centrifugation protocol, with lid closed and 1600 revolutions per minute (rpm) for 10 minutes, resulting in the separation of red blood cells, plasma with platelets and leucocytes. After were opened and plasma was pipetted and transferred into another sterile tube. Plasma was centrifuged again at 2000rpm for 10 minutes; as a result it was split into two parts: on the top, consisting of platelet-poor plasma (PPP) and at the bottom of the platelet button. Part of the PPP was discarded so that only 1ml remained in the tube along with the platelet button. This material was gently agitated to promote platelets resuspension and activated when added 0.3ml of calcium gluconate, resulting in PRP gel. Double centrifugation protocol was able to make platelet concentration 3 times higher in relation to the initial blood sample. The volume of calcium gluconate used for platelet activation was 0.3ml, and was sufficient to coagulate the sample. Coagulation time ranged from 8 to 20 minutes, with an average of 17.6 minutes. Therefore, time of blood centrifugation until to obtain PRP gel took only 40 minutes. It was concluded that PRP was successfully obtained by double centrifugation protocol, which is able to increase the platelet concentration in the sample compared with whole blood, allowing its use in surgical procedures. Furthermore, the preparation time is appropriate to obtain PRP in just 40 minutes, and calcium gluconate is able to promote the activation of platelets.INDEX TERMS: Platelet-rich plasma, platelet concentration, revascularization, rabbits.

Wounds of large tracts with loss of tissue viability and delayed healing by secondary intention are cases where it is necessary the use of reconstructive surgical techniques. The platelet rich plasma (PRP) is a product with a higher platelet concentration, adjuvant in the healing process of reconstructive surgeries, assisting in the processes of hemostasis and stimulation of angiogenesis. Thus, a study was devised to assess the efficacy of the gel produced from the platelet rich plasma (PRP) in the forward axial flaps thoracodorsal pattern in rabbits to evaluate the ability to promote the integration of the flap the recipient bed. We used 30 white rabbits New Zealand, separated into two groups of 15 animals, comprising the platelet rich plasma groups (GPRP), in which we used the gel before the synthesis of the surgical wound , and control (CG), in which only saline was used. To obtain the PRP, the blood was collected from the animals, was determined and the platelet count before preparation of the gel. At the beginning and end of the experiment the animals were weighed for analysis of average weight gain. After surgery began macroscopic in the 3rd, 7th and 14th day reviews, and we assessed the presence or absence of exudate, skin integrity, edema, redness and necrosis. After this step, yielded the material for the manufacture of surgical wound, followed by microscopic histological slides. We evaluated vascular proliferation, presence of polymorphonuclear and mononuclear cells, fibroblast proliferation, collagen deposition, reepithelialization and hemorrhage. The data were subjected to statistical analysis (Student t test, t paired, and Kruskal Wallis test, and p<0.05). The average weight gain was not significant between the groups; platelet concentration in the final sample of PRP was significantly higher when compared with the original; exudate and necrosis were significantly higher in the control group compared to PRP group, vascular proliferation and reepithelialization were significantly greater in PRP group, whereas the presence of mononuclear cells, polymorphonuclear cells, proliferation of fibroblasts, collagen and hemorrhage were not significant between groups. Obtained on the third day, as the difference significantly greater exudate variable in the control group compared to the PRP group; on 1 Recebido em 14 de fevereiro de 2015.Aceito para publicação em 22 de setembro de 2015.

Mast cell tumors represent the most common malignant skin tumor in the dog. This review outlines the incidence, etiology and clinical signs of mast cell tumors. Diagnostic tests, staging and treatments are also discussed.

El carcinoma de células escamosas (CCE) es uno de los tumores cutáneos malignos más comunes en perros; son localmente invasivos y pueden comprometer la dermis e hipodermis. Generalmente afecta animales seniles y no existe predisposición por raza. El tumor puede realizar un crecimiento productivo, friable y papilar; o puede ser erosivo con formación de lesión ulcerada. Ocurre en cualquier lugar de la piel, siendo los sitios con más frecuencia: el tronco, la pierna, el escroto, los labios y el lecho ungueal. El tratamiento por la escisión quirúrgica con margen amplia y la criocirugía pueden ser realizados y asociados al tratamiento quimioterapéutico y la radioterapia. El objetivo de este relato es describir el tratamiento eficaz en un canino mestizo, macho, con seis años de edad y 22 kg de peso vivo, con diagnóstico cito e histopatológico de carcinoma de células escamosas en el miembro pélvico, donde fueron realizadas inicialmente cuatro sesiones de criocirugía y después de la recuperación del paciente, se efectuó la quimioterapia antineoplásica por vía intravenosa por cuatro sesiones. De acuerdo con los resultados obtenidos y después de 30 meses de terapia se concluye que la criocirugía fue una técnica eficaz para la cura de este tipo de neoplasia...