Canine transmissible venereal tumour in four year old bull mastiff dog: A case report

A four year old bull mastiff dog weighing 30 kg was presented to the Khola Veterinary Clinic, Umuahia, Abia State, Nigeria with complaint of protruding mass on the penis. Anamnestic information revealed that the dog has mated two bitches and was later traced that one of the bitches was treated for transmissible venereal tumour (TVT) five months ago before mating. However, the bitch developed the lesion again two months after whelping and was again treated with Vincristine. The Bull mastiff dog was observed to develop a protruding mass on the penis 10 months after mating with the bitch with history of TVT. The dog was treated with vincristine which led to the disappearance of the mass but however the mass re-occur two months after every treatment re-occurring in more severe form. On clinical examination the dog has normal behavior, appetite and vital parameters. A pedunculated a multilobular mass was seen on the shaft and caudal area of the penile mucosa. The material for cytological diagnosis was taken with the imprint method of the mass and cytological films were prepared and stained with Haematoxylin and Eosin and then view under x40 and oil immersion. The result showed high cellularity and presence of tumor cells which occurred discretely and confirmed CTVT. The case was managed by surgical excision and treatment with Vincristine at 0.05 mg/kg weekly for 4 weeks. Keywords: Canine transmissible venereal tumor, Bull mastiff dog, Cytology, Surger