Table 2.

Characteristics of patients and breast cancer samples

Characteristic	Number of patients (n = 70)
Median age (range)	57.3 (39–72)
Tumor grade according to Bloom-Richardson system
I	21
II	30
III	19
Tumor size
T1	22
T2	33
T3-T4	15
Lymph node metastasis
No	44
Yes	26
Menopausal status
Premenopausal	23
Postmenopausal	47
ER and PR status
ER + PR+	33
ER-PR+/ER + PR-	16
ER-PR-	21