Associação entre análise citológica e histopatológica de nódulos de tireoide

Abstract

Every thyroid nodule must be studied with ultrasonography, and if any sign of malignancy is present, cytological analysis must be done, collected by Fine Needle Aspiration. This analysis is classified according to The Bethesda System for Reporting Thyroid Cytopathology, that ranges among I – Unsatisfactory and VI – Malignant and will substantiate the conduct. Objective: To evaluate the relation between cytological and histopathological analysis of thyroid nodules. Methods: This is a transversal study that evaluated in a non-probabilistic way the medical records of patients who underwent thyroidectomy in Hospital São Vicente de Paulo in the period of January 2009 to December 2019 and made Fine Needle Aspiration biopsy before the surgery. The data gathering was made in March 2021. Results: 237 fitted in the inclusion criteria. There was a predominance of woman (79,7%) and the mean age was 49,1 years. The most frequent cytological finding was the Bethesda V category – Suspicion of malignancy (51,0%) and, in the histopathological analysis, there was a predominance of malignant lesions (60,3%), represented mainly by the papillary carcinoma (78,3%). About the malignancy rate, was a peak in the age range of 31 to 40 years (78,0%, p<0,01), and apex in the Bethesda class VI (90,9%). Conclusion: The malignancy rate found is like the Brazilian and worldwide literature´s. The Bethesda classification for cytopathological exams showed a sensibility of 88,8% and positive predictive value of 78,3% when categorized according the therapeutic conduct and cross-checked against the malignancy rate.