Table 1 Characteristics of the patients involved in the study

Age (years) (mean ± SD): 65.26 ± 12.68

Age at diagnosis:

≤ 50

16

> 50

52

Histotype:

IDC

55

DC

2

ILC

8

IDLC

1

Undetermined

2

Diameter (mm) (mean ± SD): 18.90 ± 9.24

46

≤ 20

20

> 20

2

Undetermined

Tumor size (pT classification):

T1

46

T2

18

T3

2

Undetermined

2

Tumor grade (G):

G1

18

G2

24

G3

24

Undetermined

2

Nucleolar size (μm2):

≤ 5

23

> 5

41

Undetermined

4

p53 expression (positivity):

≤ 10 (p53 wild type)

55

> 10 (mutated p53)

11

Undetermined

2

ER expression:

Negative

11

Positive

55

Undetermined

2

PR expression:

Negative

13

Positive

53

Undetermined

2

Ki67 expression:

≥ 20

34

< 20

32

Undetermined

2