TIRADS ve Bethesda Sınıflandırmaları Kullanılarak Tiroid Nodülünün Ultrason ve Sitolojik Tanısının Korelasyonu

Aim: The objective of this study was to evaluate the compatibility between the two diagnostic methods used in the initial evaluation of individuals with a thyroid nodule, the TIRADS and Bethesda systems. Material and Method: Between January 2020 and December 2022, FNA biopsies performed by a single interventional radiologist on 414 patients with thyroid nodules under US guidance were retrospectively reviewed. Demographic information of the patients, size of the nodules, echogenicity, TIRADS and BETHESDA scores were recorded and analyzed. Results: The mean age of the study population was 50.4 ± 14.2 years and the majority were female patients (74.9%). When thyroid nodules were classified according to TRIADS criteria, it was TIRADS TR2 in 29 (7%) patients, TIRADS TR3 in 147 (35.5%) patients, TR4 in 166 (40.1%) patients, and TR5 in 72 (17.4%) patients. The probability of malignant FNAC (Bethesda Class V and Class VI) in TIRADS classes 2, 3, 4, and 5 was 0%, 3.4%, 31.3%, and 66.7%, respectively. The probability of a benign FNAC (Bethesda Class II) in TIRADS category 2 was 100%, while for TIRADS classes 3, 4 and 5 it was 81.6%, 34.9% and 25%, respectively. Conclusion: Our study shows a good correlation between the Bethesda Classification of thyroid nodule FNAC and thyroid ultrasound reporting using the TIRADS classification. Correct interpretation of the two findings helps the clinician reduce the risk of unnecessary invasive procedures in patients who are unlikely to demonstrate thyroid cancer, while facilitating the identification of patients at high risk of cancer.