Table 2.

Patient characteristics of early-stage breast cancer

Women enrolled in study16
No. biopsy samples taken17
n = 16 (%)
Average age and range (y)57 (34-82)
Race
    Caucasian14 (88)
    African American2 (12)
Menopausal status
    Postmenopausal11 (69)
    Premenopausal5 (31)
Stage of breast cancer
    Stage 0/DCIS1 (6)
    Stage I8 (50)
    Stage II7 (44)
Average tumor size and range (cm)3.2 (0.5-5.0)
Type of tumor
    Invasive ductal12 (75)
    Invasive lobular1 (6)
    Mixed ductal/lobular2 (12)
    DCIS1 (6)
Tumor receptor status
    ER+11 (69)
    PR+8 (50)
Lymph node–positive disease5 (31)