The results of the cytological and histological examination of 348 canine lesions, localised in various organs, were compared with respect to the tumourous or non#x2010;tumour nature of the lesions and the malignancy or benignancy of tumours. The retrieval rate was 92.5. Regarding the distinction between tumourous and non#x2010;tumourous lesions, the cytological examination showed a diagnostic accuracy of 83.9, a sensitivity of 95.6, a specificity of 65.4 and a predictive value for the presence of tumour of 93.5. The diagnostic accuracy of cytology concerning the differentiation in malignancy and benignancy of the neoplasms was 83.7, with a sensitivity of 86.8, a specificity of 79.4 and a predictive value for the presence of malignant tumour of 85.6. These results confirm the value of non#x2010;exfoliative cytology as a diagnostic method, providing rapid and valuable information with regard to diagnosis and prognosis and, consequently, for therapeutic handling. An eventual histological diagnosis remains indicated, especially in case of soft#x2010;tissue and mammary lesions.
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