BCS or Mastectomy + SNB (SN−)

BCS or Mastectomy + SNB → ALND

BCS or Mastectomy + SNB (SN+)

BCS or Mastectomy + ALND

Number of the patients

565

81

18

94

Median age

56.1

53.6

56.2

59.5

Median invasion size

14.5

17.2

26.8

31.0

Median number of axillary lymph node metastasis

0

1.9

6.8

Median number of SN metastasis

1.4

1.8

1.8

Median number of non-SN metastasis

0.8

Median number of non SN removed

10.4

Median number of SN and non SN removed

12.2

16.8