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Table 2 Characteristics of the thyroid nodules ≤ 10 mm (n = 287)

From: Malignancy risk stratification of thyroid nodules smaller than 10 mm with ACR-TIRADS, K-TIRADS, and ATA-2015 guidelines: a prospective study

Variables

Frequency

Percent

Nodule size (mm)

3

14

4.9

4

27

9.4

5

22

7.7

6

37

12.9

7

21

7.3

8

31

10.8

9

94

32.8

10

41

14.3

Echogenic foci

Negative

210

73.2

Punctate echogenic foci

42

14.6

Coarse echogenic foci

18

6.3

Fine + coarse echogenic foci

3

1.0

Peripheral echogenic foci

14

4.9

Margin of nodule

Regular

224

78.0

Ill-defined

56

19.5

Irregular

7

2.4

Echogenicity

Hyperechogenicity

173

60.3

Isoechogenicity

55

19.2

Hypoechogenicity

59

20.6

Composition

  

Solid-cyst

33

88.5

Solid

254

11.5

Shape

  

Wider-than-tall

273

95.1

Taller-than-wide

14

4.9