Punción-aspiración con aguja fina tiroidea y su correlación diagnóstica con las piezas quirúrgicas. Siete años de experiencia en Córdoba, Argentina Thyroid fine needle aspiration cytology and its diagnostic correlation to thyroidectomy specimens. Seven years of experience in Cordoba, Argentina

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SUMMARY Introduction: Fine needle aspiration (FNA) cytology of the thyroid gland is the most current method used for the initial assessment of thyroid pathology. Its main objetive is the search for malignancy in the samples received. Materi- als and methods: A retrospective study was carried out. The aspirates performed at the institution between 2000 and 2006 were revised. These were done under ultrasonography guidance. A minimum of 6 smears were obtained and stained with hematoxylin-eosin (H-E). The cytological and histological diagnoses were compared. Results: 742 FNACs corresponding to 617 patients were reviewed, 87% of which were women.Among all the aspirates, 18,9% was unsatisfactory, 69,9% was benign, 6,56% was malignant and 5,25% was suspicious. 115 patients underwent thy- roidectomy, with confirmation of benign diagnosis in 94% of the cases. Malignant diagnosis was confirmed in 91,5%. All FNACs reported as unsatisfactory gave negative results for malignancy in surgical specimens. One out of three reported as suspicious presented malignancy after surgery. Thyroid FNA had a sensitivity of 94% and specifity of 91,42%. False positive and false negative cytological results were of 4% and 7,5% respectively. Conclusion: Thyroid FNA is a useful, effective and reliable procedure for preop- erative management in thyroid pathology, advising for the use of a simple cytological classification in order to give easy to understand and clear information to the general practitioner.

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