IMPRINT AND BRUSH CYTOLOGY IN THE DIAGNOSIS OF CANINE INTRANASAL TUMORS

Fifty-four dogs with nasal tumours were included in this study. Based on histopathology, 52 tumours were malignant (36 epithelial and 16 mes enchymal) and two were benign (one oncocytoma and one pleiomorphic ade noma). Malignancy was significantly more frequently diagnosed by impri nt cytology (81 per cent of the cases) than by brush cytology (56 per cent). Brush cytology was a significantly more sensitive technique in epithelial than In mesenchymal tumours, while the sensitivity of impri nt cytology was not affected by the histological type. Brush cytology determined an epithelial origin in 88 per cent of epithelial tumours, and imprint cytology in 90 per cent. In mesenchymal tumours, the score s were significantly lower, the histological type being determined in only 20 per cent and 50 per cent, using brush and imprint cytology,res pectively.