Ultrasonography

Pure mucinous adenocarcinoma

Fibroadenoma

χ2 value

P value

Shape

Round or oval

3

24

8.60

<0.005

Irregular in shape

9

6

Edge

Clear

8

27

3.36

0.072

Blurred or burr-like

4

3

Boundary

Interface sharp

5

29

16.82

<0.005

Strong echo halo

7

1

Mass orientation

Parallel

7

25

2.86

0.12

Not parallel

5

5

Internal echo

Uniform

3

21

7.08

<0.01

Uneven

9

9

Posterior echo

Increase

7

22

0.90

0.34

Does not enhance

5

8
Table 1: Comparison of conventional ultrasound performance table of breast pure mucinous adenocarcinoma and breast fibroadenoma.