Extragenital canine transmissible venereal tumours: A case series

B. M. L. N. Bandaranayaka, S. Kabilan, K. A. R. K. Perera, C. Abeykoon, K. A. N. Wijayawardhane, H. M. S. Ariyarathne
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Abstract

Transmissible venereal tumour is a contagious tumour frequently found in dogs in Sri Lanka. Generally, canine TVT (cTVT) is transmitted via sexual intercourse and therefore the lesions are typically found in external genitals of dogs. Due to the characteristic cauliflower like gross appearance of gross lesions of TVT, diagnosis of genital TVT is mostly easy and straight forward when confirmed by cytology. However, TVT cells may transplant on mucous membranes other than external genitals due to social behaviours of dogs and produce atypical lesions at extra genital sites. Extra genital TVT is difficult to diagnose, especially when the affected dogs lacking concurrent genital lesions. Only a limited number of extragenital cTVT case reports are published in Sri Lanka and this report provide a comprehensive description of extragenital cTVT in nine dogs presented with a variety of lesions, diagnosis and response to treatment with vincristine sulphate.
犬生殖器外传播性肿瘤:一个病例系列
传染性性肿瘤是一种常见于斯里兰卡犬类的传染性肿瘤。一般来说,犬TVT (cTVT)是通过性交传播的,因此病变通常发生在狗的外生殖器。由于TVT大体病变呈花椰菜样的特征性外观,通过细胞学确诊后,生殖器TVT的诊断大多是简单直接的。然而,由于狗的社会行为,TVT细胞可能移植到粘膜上而不是外生殖器上,并在外生殖器部位产生非典型病变。外生殖器TVT很难诊断,特别是当受影响的狗没有并发生殖器病变时。斯里兰卡仅发表了数量有限的外阴cTVT病例报告,该报告全面描述了9只犬的外阴cTVT,表现为各种病变、诊断和对硫酸长春新碱治疗的反应。
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