Version May 2024
| Sonographic pattern | Ultrasound features | Estimated risk of malignancy | Consider biopsy (FNA size cutoff, largest dimension) |
| High suspicion | Solid hypoechoic nodule or solid hypoechoic component of a partially cystic nodule WITH one or more of the following features: Irregular margins (infiltrative, microlobulated), microcalcifications, taller than wide shape, rim calcifications with small extrusive soft tissue component, evidence of extrathyroidal extension | >70 to 90%* | Recommend FNA at ≥1 cm |
| Intermediate suspicion | Hypoechoic solid nodule with smooth margins WITHOUT microcalcifications, extrathyroidal extension, or taller than wide shape | 10 to 20% | Recommend FNA at ≥1 cm |
| Low suspicion | Isoechoic or hyperechoic solid nodule, or partially cystic nodule with eccentric solid areas, WITHOUT microcalcification, irregular margin or extrathyroidal extension, or taller than wide shape | 5 to 10% | Recommend FNA at ≥1.5 cm |
| Very low suspicion | Spongiform or partially cystic nodules WITHOUT any of the sonographic features described in low, intermediate, or high suspicion patterns | <3% | Consider FNA at ≥2 cm Observation without FNA is also a reasonable option |
| Benign | Purely cystic nodules (no solid component) | <1% | No biopsy¶ |
ATA: American Thyroid Association; FNA: fine-needle aspiration.
* The estimate is derived from high-volume centers; the overall risk of malignancy may be lower given the interobserver variability in sonography.
¶ Aspiration of the cyst may be considered for symptomatic or cosmetic drainage.آیا می خواهید مدیلیب را به صفحه اصلی خود اضافه کنید؟
