Table 1 Patients’ characteristics and clinical features

Age (year)

 Median 51 (range 33–67)

<50

21

45

>50

26

55

Histologic type

Ductal carcinoma

29

62

Lobular carcinoma

10

21

Other

1

2

Unknown

7

15

Tumor grading

G2

33

70

G3

14

30

Tumor extent

T4a,b,c

35

74

T4d

12

26

Lymph node involvement

N0

6

13

N+

41

87

ER/PgR status

ER positive/ER negative

23/24

49/51

PR positive/PR negative

16/31

34/66

HER2 status

HER-2 positive

13

28

HER-2 negative

34

72

Triple-negative status

Present

19

40

Absent

28

60

Proliferative index

Ki67 positive

24

51

Ki67 negative

23

49