TABLE 2. Preoperative Sonographic Findings of the Index Nodules.
|
Variables |
Benign nodules (n = 41) |
Malignant nodules (n = 35) |
p |
|
|
Volume (cc), median (IQR) |
1.3 (0.7-3.7) |
1.2 (0.5-15.1) |
0.455† |
|
|
Longitudinal diameter (mm), median (IQR) |
18.9 (13.8-24.5) |
18 (12.1-39) |
0.770† |
|
|
AP/T ratio, median (IQR) |
0.71 (0.64-0.86) |
0.77 (0.67-0.89) |
0.229† |
|
|
Echogenicity, n (%) |
Anechoic |
0 (0) |
1 (2.9) |
0.540§ |
|
Hypoechoic |
5 (12.2) |
5 (14.3) |
||
|
Isoechoic |
22 (53.7) |
23 (65.6) |
||
|
Iso-hypoechoic |
9 (21.9) |
5 (14.3) |
||
|
Iso-hyperechoic |
3 (7.3) |
1 (2.9) |
||
|
Indeterminate |
2 (4.9) |
0 (0) |
||
|
Calcification, n (%) |
None |
32 (78.1) |
29 (82.8) |
0.679§ |
|
Macro |
3 (7.3) |
3 (8.6) |
||
|
Micro |
3 (7.3) |
1 (2.9) |
||
|
Macro and micro |
1 (2.4) |
2 (5.7) |
||
|
Eggshell |
2 (4.9) |
0 (0) |
||
|
Halo sign, n (%) |
- |
13 (31.7) |
15 (42.9) |
0.315# |
|
TIRADS, n (%) |
1 |
0 (0) |
0 (0) |
0.734§ |
|
2 |
0 (0) |
1 (2.9) |
||
|
3 |
22 (53.7) |
18 (51.4) |
||
|
4 |
17 (41.4) |
13 (37.1) |
||
|
5 |
2 (4.9) |
3 (8.6) |
||
†Mann–Whitney U test, #Pearson chi-square test, §Fisher’s exact test.
IQR, interquartile range; AP/T ratio, anteroposterior to transverse diameter ratio; TIRADS, thyroid Imaging reporting and data systems.