Thyroid Imaging Reporting and Data System
A scoring system that assesses the malignancy risk of thyroid nodules based on ultrasound features. Five features are scored and the total determines the TR1-TR5 category.
Composition
Echogenicity
Shape
Margin
Echogenic foci
Select all features
Benign-appearing nodule
Management: No FNA needed
Not suspicious nodule
Management: No FNA needed
Mildly suspicious nodule
Management: FNA if >=25mm; follow-up if >=15mm
Moderately suspicious nodule
Management: FNA if >=15mm; follow-up if >=10mm
Highly suspicious nodule
Management: FNA if >=10mm; follow-up if >=5mm
This classification system is intended for clinical decision support. Final diagnosis and treatment decisions rest with the clinician.