Table 1 Comparisons on US features between the benign group and the malignant group.
Characteristics | Benign group (n = 902) | Malignant group (n = 98) | P |
|---|---|---|---|
Gender | 0.750 | ||
Female | 703(77.9) | 75(76.5) | |
Male | 199(22.1) | 23(23.5) | |
Age #1 | 52.8 ± 12.8 | 49.0 ± 14.0 | 0.007* |
Maximum diameter #2 | 16(18) | 10.5(21.25) | <0.001* |
Maximum diameter | 0.093 | ||
≤20 mm | 557 (61.8) | 69(70.4) | |
>20 mm | 345 (38.2) | 29(29.6) | |
Margin | <0.001* | ||
Well defined | 836(92.7) | 79(80.6) | |
Ill-defined | 66(7.3) | 19(19.4) | |
Echogenicity | 0.006* | ||
Iso-echoic | 254(28.2) | 15(15.3) | |
Slightly hypo-echoic | 648(71.8) | 83(84.7) | |
Location | 0.412 | ||
Left | 406(45.0) | 51(52.1) | |
Right | 484(53.6) | 46(46.9) | |
Isthmus | 12(1.4) | 1(1.0) | |
Component | 0.894 | ||
Solid | 180(20.0) | 19(19.4) | |
Predominantly solid | 722(80.0) | 79(80.6) | |
Echo uniformity | 0.721 | ||
Uniform | 315(34.9) | 36(36.7) | |
Non-uniform | 587(65.1) | 62(63.3) | |
Macro-calcification | 0.022* | ||
Present | 244(27.1) | 16(16.3) | |
Absent | 658(72.9) | 82(83.7) | |
Vascularity | 0.075 | ||
Type I | 330(36.6) | 37(37.8) | |
Type II | 246(27.3) | 17(17.3) | |
Type III | 326(36.1) | 44(44.9) | |
Indeterminate hyper-echoic spot | 0.010* | ||
Present | 13(1.4) | 5(5.1) | |
Absent | 889(98.6) | 93(94.9) |
