Table 1 Features of the 136 patients and tumors

Number of patients, n (%)

136

82 (60.3)

54 (39.7)

–

Males/Females, n (%)

69/67 (50.7/49.3)

38/44 (27.9/32.4)

31/23 (22.8/16.9)

0.207

Age, y, mean ± SD

49.3 (range16–86)

47.5 ± 17.3

51.9 ± 17.5

0.15

Location: deep/superficial, n (%)

104/32 (76.5/23.5)

59/23 (71.9/28)

45/9 (83.3/16.7)

0.13

Maximum diameter, mm, median (IQR)

64 (37–89)

59 (36–83)

76 (41–99)

0.046

Distance from the skin, mm, median (IQR)

8 (4–11)

8 (4–12)

10 (5–13)

0.23

Well-defined margins, yes/no, n (%)

125/11 (91.9/8.1)

75/7 (91.5/8.5)

50/4 (92.6/7.4)

0.81

Multilobular, yes/no, n (%)

37/99 (27.2/72.8)

21/61 (25.6/74.4)

16/38 (29.6/70.4)

0.61

Necrosis,^b yes/no, n (%)

20/115 (14,7/84,5)

9/72 (10,9/87,8)

11/43 (20,3/79,6)

0.109

Echotexture hypoechoic, n (%)

65/71 (47.8/52.2)

36/46 (43.9/56.1)

29/25 (53.7/46.3)

0.173

Elastography, kPa, median (IQR)

38.1 (22,4–54.6)

32,1(18.2–51,1)

51.2 (31.3–71.0)

0.004

T/F^*, median (IQR)

3.4 (1.2–4.9)

2.34 (1.4–4.7)

4.1 (2.1–6.1)

0.047