Table 2.

Descriptive statistics for all 26 patients

Age (years)	52.0 ± 12.2 (range 31–75)
Location
Left	17
Right	9
MR
a1 (cm)	1.488 ± 0.255 (range 1.1–1.9)
b1 (cm)	1.219 ± 0.325 (range 0.5–1.9)
ER positive	23
PR positive	17
HER2 positive	6
High expression of Ki67	13
Molecular subtype
Luminal A	12
Luminal B (HER2 negative)	6
Luminal B (HER2 positive)	5
HER2 enriched (nonluminal)	1
Triple negative	2

Except for age and MR, the data are the number of patients

Luminal A: estrogen receptor (ER) and progesterone receptor (PR) positive, Ki67 level less than 20%, HER2 negative. Luminal B (HER2 negative): ER positive and HER2 negative (PR < 20% or Ki67 ≥ 20%). Luminal B (HER2 positive): ER and HER2 positive (PR < 20% or Ki67 ≥ 20%). HER2 enriched (nonluminal): ER and PR negative and HER2 positive. Triple negative: ER, PR, and HER2 negative