Table 2 Ultrasound features of thyroid tumors
From: A new scoring system for risk stratification of thyroid tumors
US features | N (%) | |
|---|---|---|
Nodule Number | ||
single | 352(80.9) | |
Multiple | 83(19.1) | |
Location | ||
Left | 103(23.7) | |
mid | 104(23.9) | |
Right | 193(44.4) | |
Isthmus | 35(8.0) | |
extrathyroidal extension | ||
yes | 170(39.1) | |
no | 265(60.9) | |
Nodule max diameter | ||
≤1 cm | 144(33.1) | |
1–4 cm | 197(45.3) | |
>4 cm | 94(21.6) | |
Echogenicity | ||
Anechoic | 0(0) | |
Hypoechoic | 274(63.0) | |
Isoechoic | 158(36.3) | |
Hyperechoic | 3(0.7) | |
Aspect Ratio | ||
<1 | 320(73.6) | |
≥1 | 115(26.4) | |
Composition | ||
Cystic | 0(0) | |
Mixed | 117(26.9) | |
Solid | 318(73.1) | |
Calcifications | ||
Absent | 214(49.2) | |
Micro | 162(37.2) | |
Macro | 34(7.8) | |
comet-tail artifacts | 25(5.7) | |
Shape | ||
Round to oval | 282(64.8) | |
Irregular | 153(35.2) | |
Margin | ||
Smooth | 216(49.7) | |
Irregular | 219(50.3) | |
Halo | ||
Absent | 341(78.4) | |
Regular complete halo | 64(14.7) | |
Irregular interrupted halo | 30(6.9) | |
Blood Flow | ||
0 | 64(14.7) | |
1 | 121(27.8) | |
2 | 34(7.8) | |
3 | 216(49.7) | |
Elasticity score | ||
1 | 0(0) | |
2 | 119(27.4) | |
3 | 155(35.6) | |
4 | 161(37.0) | |
5 | 0(0) | |
Suspicious lymph nodes | ||
yes | 56(12.9) | |
no | 379(87.1) |