Table 2 Triage of nodules for FNA or observation [1]
TI-RADS level | Recommendations |
|---|---|
TR1 | No FNA required |
TR2 | No FNA required |
TR3 | Nodule size ≥ 1.5 cm: follow-up after 1, 3, and 5 years Nodule size ≥ 2.5 cm: FNA is recommended |
TR4 | Nodule size ≥ 1.0 cm: follow-up after 1, 2, 3, and 5 years Nodule size ≥ 1.5 cm: FNA is recommended |
TR5 | Nodule size ≥ 0.5 cm: annual follow-up for up to 5 years Nodule size ≥1.0 cm: FNA is recommended |