A population of 37 cats with nasal disease underwent rhinoscopy. It was analyzed the presence of mass and its relationship with neoplasia, type of mass and neoplasm observed, mean age of affected animals, aspects related to the endoscopic visualization, affection of choanae, retrograde visualization and diagnostic sensitivity and specificity of the endoscopic view with respect to neoplasia. After statistical analysis, it was observed that the nasal mass was in most cases of neoplastic nature, being the nasal carcinoma, the most represented neoplasm followed by the lymphoma. The choana is the most frequent situation being observed by retrograde endoscopic visualization and presenting the rhinoscopy as a high sensitivity and specificity tool respect to the diagnosis of neoplasia.
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