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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE

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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2012 June;171(3):287-93

language: English

Evaluation of diagnosis efficiency of exfoliative cytology in pre-malignant and malignant lesions of the mouth

Evangelista Bagateli J. C. 1, Veltrini V. C. 2, Kamei N. C. 2

1 State University of Maringá (PGO-UEM), Paraná, Brazil;
2 Laboratory of Oral Pathology, State University of Maringá (UEM) and University Center of Maringá, Paraná, Brazil


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Aim. This study evaluated the diagnosis efficiency of exfoliative cytology, comparatively to biopsy, in pre-malignant and malignant lesions of the mouth.
Methods. Smears were obtained from 17 lesions with clinical features which suggest this diagnosis, using metal spatula number 24, and, in a same surgical moment, biopsies of these lesions were performed. Then, the results of both techniques were compared.
Results. For premalignant lesions, there were 63.6% of agreement between the analyzed techniques, 9.1% of false-positive and 27.3% of false-negative results for exfoliative cytology. For malignant lesions, the exfoliative cytology got 50% of correct diagnosis and 50% of fase-negative results. Considering all lesions, the results of cytological technique were satisfactory in 60% of the cases, achieving 6.7% of false-positive and 33.3% of false-negative results.
Conclusion. It was concluded that exfoliative cytology is fairly efficient in attributing the degree of epithelial dysplasia to pre-malignant lesions; however being unable to offer absolute reliability in the diagnosis of oral cancer. It is important to perform the cytological technique correctly, to avoid that eventual mistakes damage the diagnosis.

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