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2020, Number 3

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Rev Med UAS 2020; 10 (3)

Incidence of malignancy in thyroid nodules in patients undergoing ultrasound-guided fine needle aspiration biopsy (FNAB)

Bujaidar-Tobias FA, Zatarain-Bayliss L, Dehesa-López E, Peraza-Garay FJ

Language: Spanish
References: 17
Page: 127-134
PDF size: 134.99 Kb.


ABSTRACT

Objective: To determine the incidence of malignancy by cytological study, in patients with a diagnosis of thyroid nodule undergoing BAAF in the Imaging Unit of the Culiacán Civil Hospital, hoping to find an incidence of malignancy similar to that reported in the literature. Material and methods: An observational, prospective, and cross-sectional study was conducted in which a sample of 84 patients with cytological outcome previously submitted to BAAF of ultrasound-guided thyroid nodule was included. The TIRADS system was used to classify the ultrasound characteristics of the thyroid nodule and the Bethesda system for cytological classification. The incidence was calculated by dividing the total positive cases for thyroid cancer by the total population at risk. Results: A percentage of malignancy of 4.76% was found for lesions in Bethesda category V, which corresponded to a total of 4 patients. The ultrasound findings that showed a greater correlation with cases of malignancy (P ‹.05) were the presence of microcalcifications, irregular contours, dimensions larger than wide and adenopathies. Conclusions: The results obtained by cytological study show an incidence of malignancy similar to the literature, which suggests that the BAAF with cytological result analyzed by the Bethesda system is decisive in the diagnosis of malignancy; however, for lesions within categories III and IV it is necessary to repeat the BAAF or perform an excisional biopsy to determine malignancy.


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