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Table 2 Characteristics of the study cohort. Number of patients according to age and TNM staging. T1-T4 increasing tumor size and extent. T1 = smallest tumor. N = lymph node status, N0 = no tumor in the lymph nodes, N1-N3 = increasing number of nodes affected. M0-M1 = No distant mestastases (0) or distant metastases have been found (1)

From: Refinement of breast cancer molecular classification by miRNA expression profiles

pam50

mean age

T1

T2

T3

N0

N1

N2

N3

NX

M0

M1

MX

Basal

65

23

35

1

50

9

0

0

0

50

0

9

Her2

66

22

23

0

25

15

3

1

1

41

1

3

LumA

63

21

18

1

32

6

2

0

0

33

0

7

LumB

65

25

30

2

47

9

1

0

0

53

1

3