Discipline: Veterinary Medicine
Fifty dogs, 1-8 years old, of both sexes and of various breeds presented to the Veterinary Teaching Hospital, College of Veterinary Medicine, University of the Philippines Los Baños from July 2002 to July 2011, were examined and diagnosed to have canine transmissible venereal tumor. Confirmation of the diagnosis was made through microscopic examination of the impression smears of the abnormal masses stained with Modified Wright Giemsa Stain and observation of individually exfoliating round cells with moderate nuclear to cytoplasmic ratio and prominent nucleoli and intracytoplasmic vacuoles. The study showed that TVT is most common in 3-year old intact female dogs that may be pure or mixed breed. The dogs were usually presented for veterinary attention due to abnormal growth and/or genital bleeding independent of urination and estrous cycle. Lesions are most commonly found in the vulvovagina of females and the penis of males.