Diagnosis of canine transmitted venereal tumor in nasal cavity using rhinoscopy: report of 4 cases

Abstract

The canine transmissible venereal tumor (TVT) affects domestic dogs through intercourse, mechanical transplantation or by natural occurrence, with venereal transmission being the most common. It can occur in genital or extragenital regions, such as the nasal cavity. Complementary imaging exams allow an appropriate assessment of the location and, about rhinoscopy, an in loco assessment and collection of tumor tissue for histopathological evaluation. This article aimed to report four cases of dogs with TVT in the nasal cavity through rhinoscopy. A chow-chow dog and three unmarried dogs, all males, two to seven years old, with a history of upper respiratory noise, epistaxis, sneezing, exercise intolerance and deformity in nasal bone were admitted to the examination radiographic examination and biopsy guided by rhinoscopy for collection of a nasal tumor sample, with suspicion of CTVT. The collected material was sent, later, for histopathological examination, which confirmed the clinical suspicion and concluded the diagnosis. The association of imaging methods with rhinoscopy and radiographic examination, associated with histopathological examination, proved to be more efficient than alternative methods because it allows the study of the skull and its compliance, the direct visualization of the nasal cavity and the choice of the ideal site for collection of material, providing more accurate and safe results by histopathological analysis.
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Keywords

Dog
image examination
respiratory system
veterinary oncology