Table 1. Patient clinical characteristics.

Characteristic	N (%)
Age
≤55	53 (75.7)
>55	17 (24.3)
Tumor location
Right	39 (55.7)
Left	31 (44.3)
TNM staging
T1	31 (44.3)
T2	36 (51.4)
T3	3 (4.3)
Tumor grade
I	8 (11.4)
II	46 (65.7)
III	16 (22.9)
Molecular subtype
LuminalA	21 (30.0)
LuminalB	31 (44.3)
Her-2 positive	10 (14.3)
Triple negative	8 (11.4)
Estrogen receptor
Positive	53 (75.7)
Negative	17 (24.3)
Progesterone receptor
Positive	47 (67.1)
Negative	23 (32.9)
Her-2/neu
Positive	19 (27.1)
Negative	51 (72.9)
Ki-67
≤15%	26 (37.1)
>15%	44 (62.9)