Aim: To assess the diagnostic value of the American College of Radiology Thyroid Imaging Reporting and Data System (ACR-TIRADS) in the diagnosis of thyroid nodules
Materials and methods: From September 2020 to November 2021, 150 patients (26 men and 124 women; mean age: 48.4 ± 12.7 years) underwent ultrasound (US) examination and US-guided fine-needle aspiration biopsy (FNAB) procedure. US images were classified and scored according to the ACR-TIRADS criteria. Histopathological diagnoses were based on the fine-needle aspiration biopsy results. The diagnostic value of the ACR-TIRADS in the diagnosis of thyroid nodules was assessed.
Results: There was one nodule with TIRADS 1, 34 nodules TIRADS 2, 34 nodules with TIRADS 3, 38 nodules with TIRADS 4, and 43 nodules with TIRADS 5. 28 FNABs (18.7%) resulted in non-diagnostic aspiration, 40 FNABs (26.7%) revealed atypia of undetermined significance, 4 FNABs (2.7%) revealed follicular lesion, 43 FNABs (28.7%) revealed benign nodules, and 35 FNABs (23.3%) revealed malignant nodules. After eliminating the non-diagnostic aspirations, atypia of undetermined significance, and follicular lesion, the malignancy rates of TIRADS 1, 2, 3, 4, and 5 were 0%, 0%, 6.3%, 45.5%, and 82.9%, respectively. Nodule composition (p<0.001), echogenicity (p<0.001), shape (p=0.010), margin (p<0.001), and calcification (p<0.001) were significantly different between benign and malignant nodules.
Conclusions: ACR-TIRADS is an effective classification system in the diagnosis of thyroid nodules. US features of the nodules can help to predict malignancy of the nodule.
Anahtar Kelimeler: Thyroid nodule, Ultrasound, FNAB, Malignancy
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