Table 1.

Patient demographics

Characteristic	Value (n = 1084)
Age (years), median (range)	60 (26–92)
Tumor size
Median (range) (mm)	17 (1–150)
≤20 mm	717 (66 %)
>20 mm	346 (32 %)
Not available	21 (2 %)
T stage
pT1	604 (56 %)
pT2	359 (33 %)
pT3	28 (2 %)
pT4	11 (1 %)
pTis	82 (8 %)
Histomorphology
Ductal carcinoma	859 (79 %)
Lobular carcinoma	99 (9 %)
Mixed type	6 (1 %)
Other	120 (11 %)
Bloom–Richardson grade
Well differentiated	114 (11 %)
Moderately differentiated	570 (53 %)
Poorly differentiated	295 (27 %)
Not available	105 (9 %)
Estrogen receptor
Positive	806 (74 %)
Negative	221 (20 %)
Not available	57 (6 %)
Progesterone receptor
Positive	534 (49 %)
Negative	354 (33 %)
Not available	196 (18 %)
HER2/neu receptor
Positive	162 (15 %)
Negative	605 (56 %)
Not available	317 (29 %)
Multifocality
Yes	113 (10 %)
No	971 (90 %)