Table II.
Comparison of color Doppler ultrasonographic features between MTC and PTC.
| Ultrasonic imaging | MTC (n=39) | PTC (n=50) | χ2 | P-value |
|---|---|---|---|---|
| Position | ||||
| Middle upper pole | 23 | 28 | 0.030 | >0.05 |
| Lower pole | 16 | 21 | ||
| Echo | ||||
| Hypoecho or extreme hypoecho | 37 | 44 | 1.265 | >0.05 |
| Isoecho or hyperecho | 2 | 6 | ||
| Boundary | ||||
| Clear | 24 | 13 | 11.392 | <0.01 |
| Unclear | 15 | 37 | ||
| Shape | ||||
| Round or oval | 25 | 12 | 14.507 | <0.01 |
| Irregular | 14 | 38 | ||
| Aspect ratio | ||||
| >1 | 6 | 32 | 21.165 | <0.01 |
| ≤1 | 33 | 18 | ||
| Calcification | ||||
| No | 2 | 10 | 24.128 | <0.01 |
| Microcalcification | 11 | 32 | ||
| Course calcification | 26 | 8 | ||
| Internal blood flow | ||||
| No | 3 | 5 | 13.390 | <0.01 |
| Not rich | 11 | 32 | ||
| Rich | 25 | 13 | ||
| Lymph node metastasis | ||||
| No | 21 | 43 | 11.214 | <0.01 |
| Yes | 18 | 7 | ||
MTC, medullary thyroid carcinoma; PTC, papillary thyroid carcinoma. Data are expressed as number of patients.