Implementation of the Bethesda system for cytology reporting of thyroid fi ne needle aspirates with histological follow-up: experience in a cancer treatment center
Keywords:
Thyroid Gland, Fine-Needle Biopsy, Terminology, PathologyAbstract
Objective: To determine the frequency of the final histological diagnosis in the follow-up of cytology results of thyroid fine needle aspirates implemented using the Bethesda system (BS).
Methods: A cross-sectional study was conducted comparing the cytology results of thyroid fine needle aspirates implemented with the BS, and the final histopathology result in patients with thyroid gland lesions, who were seen in the Colombia National Cancerology Institute during the years 2010 to 2012.
Results: A review was made of the cytopathology and histopathology reports of 104 patients with thyroid nodules. The mean age of the patients was 51.9 years. The results of the cytopathology by BS categories were: 37.5% category V, 30.8% category VI, 15.4% category IV, 6.7% categories I and II, and 2.9% category III. Papillary carcinoma was the most frequent histopathology diagnosis of all the cases, with 76%, followed by goiter with 6.7%. In the comparative analysis, the cytology categories IV, V and VI, 89.8% of the cases had a malignant lesion in the final histology report, and 77% of those of category II (benign) had the same result in the final histopathology diagnosis.
Conclusions: The cytology of thyroid fine needle aspirates interpreted using the BS in the National Institute of Cancerology is of high diagnostic quality in the detection of thyroid malignancy when compared with the final histopathology diagnosis.
Author Biographies
Alfredo Romero Rojas, Instituto Nacional de Cancerología
Grupo de Patología, Instituto Nacional de Cancerología, Bogotá, Colombia
Mario Alexander Melo Uribe, Universidad de La Sabana
Grupo de Patología Quirúrgica, Universidad de La Sabana, Chía, Cundinamarca, Colombia
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