Tumor venéreo transmissível: estudo retrospectivo de 127 casos (1998 - 2000)

Brandão, Cláudia Valéria Seullner; Borges, A. G.; Ranzani, José Joaquim Titton; Rahal, Sheila Canevese; Teixeira, Carlos Roberto; Rocha, Noeme Sousa

doi:10.36440/recmvz.v5i1.3280

Cited by 23 publications

(32 citation statements)

References 6 publications

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“…However, female dogs were predominant, reflecting the proper deployment of TVT cells in the genital tract of bitches. Regarding breed, most tumors occurred in mongrel dogs, confirming the description of Brandão et al (2002), who attributed a higher occurrence of TVT in mixed-breed dogs. Added to this, Souza et al 2000complement that TVT is more common in areas with stray dogs.…”

Section: Discussionsupporting

confidence: 83%

“…The cases of TVT were selected regardless of gender, breed and age of the animals; although some studies state that there is no predisposition to neoplasia related to these variables (BRANDÃO et al, 2002;SALAMANCA et al, 2008). However, female dogs were predominant, reflecting the proper deployment of TVT cells in the genital tract of bitches.…”

Section: Discussionmentioning

confidence: 99%

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Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico

Lima¹,

Rabelo

Vulcani

et al. 2013

Braz. J. Vet. Res. Anim. Sci.

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The aim of this study was to identify morphological patterns and malignancy criteria of the TVT in cytopathological and histopathological evaluations and relate these characteristics to clinical evolution and response to chemotherapy. Regarding studied animals, sixteen dogs were female and four were male. The age of the animals ranged between one and ten years old. Considering breed, 80% of the dogs were mongrel dogs and 20% were of other breeds. It was found that the cytological samples allowed a better characterization of the cell type than histological ones. The plasmacytoid was the most common morphological type of TVT, followed by the lymphocytoid and mixed standards. There was no difference among the scores for the malignancy criteria and morphological types of TVT. Regarding response to chemotherapy, no morphological type of the TVT showed any difference, but the TVT presents morphological peculiarities that may interfere with tumor behavior, especially those related to increased aggressiveness and that are observed in the plasmacytoid TVT.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico

Lima¹,

Rabelo

Vulcani

et al. 2013

Braz. J. Vet. Res. Anim. Sci.

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“…Em relação à localização a maioria dos cães acometidos por TVT apresentam massas na genitália [3,5,13], embora a neoplasia possa acometer outros locais do corpo menos frequentes como cavidades oral e nasal, conjuntiva, mucosa anal, região glútea, gengiva [10] e glândula mamária [8]. No cão deste relato só havia massas no pênis e prepúcio.…”

Section: Discussionunclassified

Obstrução uretral aguda causada por tumor venéreo transmissível em um cão

Landi

Borges²,

Quessada

et al. 2017

Acta Scientiae. Vet.

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Background: Transmissible venereal tumor (TVT) is a sexually transmitted, contagious, round cell neoplasm that affects mainly the external genital organs of dogs of both sexes. Canine TVT is practically the only tumor transmitted by cellular transplantation under natural conditions. The tumor occurs in all dog breeds and in various parts of the world, especially in the tropics and subtropics. Sexually active dogs that roam are at increased risk of acquiring the infirmity. The diagnosis is clinical, and confirmed by cytology. The most effective treatment is chemotherapy with vincristine. The aim of this report is describes a case of one male dog with an acute urethral obstruction caused by TVT.Case: In a Veterinary Medical Teaching Hospital (VMTH), a dog of unknown age was admitted. Volunteers from an animal protection institution rescued the dog from the streets after information from residents. Upon admission in the VMTH, the dog had an acute urethral obstruction, detected on clinical examination. Cystocentesis was performed to relieve the condition. Complete clinical examination and blood count were performed. Hematological examination revealed anemia and thrombocitopeny. The clinical examination revealed a swelling in the preputial area, and penile exposure was not possible. Because of this it was not possible to place the urethral catheter in the animal. However, preputial fistula and a friable, bleeding mass suggestive of a TVT were detected. For penile inspection and correction of the obstruction, the dog was submitted to a surgical procedure with an incision in the preputial midline. After the incision was made, several masses with a friable and bleeding appearance were found. The masses that prevented the urinary flow were removed and, cleansed with a physiological solution. The skin was sutured to restore the normal anatomy. In the same procedure, the dog was neutered. Cytological examination of the masses confirmed the diagnosis of TVT. After the surgery, the animal was treated with vincristine sulfate for three weeks and completely recovered. Due to the findings of the hemogram that were suggestive of hemoparasite, the animal was later referred for clinical investigation.Discussion: The animal in this case had lived on the streets, where it contracted TVT. This tumor is found most often in dogs that roam. The cystocentesis performed in the patient is used in cases of urethral obstruction in dogs where it is not possible to pass catheter. The friable and bleeding masses with ulceration that were presented by the animal, demonstrated macroscopic aspects characteristic of tumor venereal transmissible. In this type of neoplasm can appear masses in diverse places of the body, but in this dog, the masses were only in the genitalia. The urethral obstruction was caused by the masses around the urethral orifice, and urethral obstructions in dogs may be from neoplasms. The cytological examination confirmed the diagnosis, and such examination is adequate to diagnose TVT. The treatment with chemotherapy is effective to control the disease. However, in this animal, surgical intervention was necessary to restore normal urinary flow. The chemotherapy with vincristine was used after the surgical procedure to eliminate remaining masses. The animal was castrated because of the need for population control in free-living dogs. Although not common, urethral obstruction in dogs can be caused by tumor venereal transmissible.

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“…A radioterapia demonstrou ser efetiva nos tumores resistentes a quimioterapia e nos locais metastáticos. Em alguns casos pode haver necessidade da realização de citorredução neoplásica e para este fim tornam-se necessários procedimentos cirúrgicos (Sousa et al, 2000;Andrade, 2002;Brandão et al, 2002;Hedlund, 2005).…”

Section: Introductionunclassified

Aspectos clínicos, hematológicos, citológicos, diagnóstico e tratamento de tumor venéreo transmissível em cão

Morais

Ferreira

Silva

et al. 2021

RSD

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O Tumor Venéreo Transmissível (TVT) é uma neoplasia maligna, cuja transmissão geralmente é de caráter sexual, podendo ocorrer também por lambedura ou mordedura. O objetivo do trabalho foi relatar um caso clínico de TVT na região da genitália em um cão macho na cidade de Belém, Pará. O diagnóstico baseou-se no exame clínico (histórico clínico), laboratorial (hemograma) e citológico. O agente terapêutico utilizado foi o sulfato de vincristina, sendo bom prognóstico em 90% dos casos, quando o tratamento é realizado corretamente. Neste caso o tratamento demonstrou-se eficaz e houve regressão do tumor.

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Tumor venéreo transmissível: estudo retrospectivo de 127 casos (1998 - 2000)

Cited by 23 publications

References 6 publications

Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico

Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico

Obstrução uretral aguda causada por tumor venéreo transmissível em um cão

Aspectos clínicos, hematológicos, citológicos, diagnóstico e tratamento de tumor venéreo transmissível em cão

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