Table I.
Association between ultrasonographic features and B-Raf proto-oncogene serine/threonine kinase gene mutation.
| Factors | Mutant (n=155) | Wild-type (n=52) | χ2 | P-value |
|---|---|---|---|---|
| Morphology | 0.584 | 0.445 | ||
| Irregular | 84 | 25 | ||
| Regular | 71 | 27 | ||
| Boundary | 0.849 | 0.357 | ||
| Unclear | 80 | 23 | ||
| Clear | 75 | 29 | ||
| Hypoechoic nodule | 0.853 | 0.356 | ||
| No | 72 | 28 | ||
| Yes | 83 | 24 | ||
| Aspect ratio | 5.216 | 0.022 | ||
| <1 | 70 | 33 | ||
| ≥1 | 85 | 19 | ||
| Microcalcification | 18.565 | <0.001 | ||
| No | 57 | 37 | ||
| Yes | 98 | 15 | ||
| Blood flow signal | 0.129 | 0.719 | ||
| Poor | 79 | 28 | ||
| Rich | 76 | 24 | ||
| Nodule size following enhancement | 11.660 | 0.001 | ||
| No change | 62 | 35 | ||
| Increase | 93 | 17 | ||
| Enhancement uniformity | 1.004 | 0.316 | ||
| Heterogeneous | 81 | 23 | ||
| Homogeneous | 74 | 29 | ||
| Enhancement degree | 1.169 | 0.280 | ||
| Equal or high | 76 | 30 | ||
| Low | 79 | 22 | ||
| Enhancement mode | 11.614 | 0.001 | ||
| Divergent | 51 | 31 | ||
| Centripetal | 104 | 21 | ||
| Enhancement time | 9.743 | 0.002 | ||
| Synchronous or fast in | 57 | 32 | ||
| Slow in | 98 | 20 | ||
| Clearance time | 0.477 | 0.490 | ||
| Synchronous or slow out | 89 | 27 | ||
| Fast out | 66 | 25 |