TIRADS | Signification | Ultrasonographic characteristics | Malignancy risk (%) |
---|---|---|---|
TIRADS 1 | Normal thyroid | ▪ Normal thyroid US | - |
TIRADS 2 | Benign aspects | ▪ Simple cyst ▪ Spongiform nodule ▪ ‘White knight’ aspect ▪ Isolated macrocalcification ▪ Typical sub-acute thyroiditis | 0.0 |
TIRADS 3 | Probably benign aspects | ▪ None of the high suspicious aspect ▪ Isoechogenic ▪ Hyperechogenic | 0.25 |
TIRADS 4A | Low suspicious aspect | ▪ None of the high suspicious aspect ▪ Moderately hypoechogenic | 6.0 |
TIRADS 4B | High suspicious aspects with 1 or 2 signs and no adenopathy | ▪ Taller-than-wide shape ▪ Irregular or microlobulated margins ▪ Microcalcifications ▪ Marked hypoechogenicity | 69.0 |
TIRADS 5 | High suspicious aspects with ≥ 3 signs and/or adenopathy | ▪ Taller-than-wide shape ▪ Irregular or microlobulated margins ▪ Microcalcifications ▪ Marked hypoechogenicity | 100 |