KTIRADS

Standardized reporting

EU-TIRADS categories and risk of malignancy

EU-TIRADS 2: pure/anechoic cyst. Transverse (left) and longitudinal (right) planes.

EU-TIRADS 2: spongiform nodule. Transverse plane.

EU-TIRADS 3: low-risk isoechoic nodule with an oval shape and smooth margins without any high-risk features. Longitudinal (left) and transverse (right) planes.

EU-TIRADS 3: grouped low-risk isoechoic nodules with an oval shape and smooth margins without any high-risk features. Longitudinal plane.

EU-TIRADS 3: low-risk hyperechoic nodule with an oval shape and smooth margins without any high-risk features. Longitudinal (left) and transverse (right) planes.

EU-TIRADS 4: intermediate-risk, mildly hypoechoic nodule with an oval shape and smooth margins without any high-risk features. Longitudinal (left) and transverse (right) planes.

EU-TIRADS 5: high-risk nodule with a taller-than-wide shape, irregular margins, microcalcifications, and marked hypoechogenicity. Longitudinal (left) and transverse (right) planes. 11 × 8 × 11 mm (length × width × thickness).

EU-TIRADS 5: high-risk nodule with a non-oval shape, spiculated margins, microcalcifications, and marked hypoechogenicity. Longitudinal (left) and transverse (right) planes.

EU-TIRADS 5: two different examples of high-risk hypoechoic nodules with lobulated margins in the transverse (left picture) and longitudinal (right picture) planes.

EU-TIRADS 5: high-risk nodule with a taller-than-wide shape in the transverse plane.

Algorithm of EU-TIRADS for malignancy risk stratification and fine-needle aspiration (FNA) decision-making. * FNA should be performed in case suspicious lymph nodes are found.