Are Basal-Like and Non-Basal-Like Triple-Negative Breast Cancers Really Different?

Table 2

Patient and tumor characteristics of triple-negative breast cancer.

Characteristic (N)	Frequency (%)
Age (years) (200)
Mean (SD)	49.7 (11.9)
Median (range)	48.5 (59)
Menstrual history (200)
Premenopausal	81 (40.5)
Perimenopausal	16 (8)
Postmenopausal	103 (51.5)
Marital status
Married	197 (98.5)
Unmarried	3 (1.5)
Age at first childbirth (years) (99)
15–20	14 (14.1)
21–25	51 (51.5)
26–30	22 (22.2)
31–35	1 (1)
Not yet	11 (11.1)
Parity (150)
Not yet	9 (6)
1	19 (12.7)
2	57 (38)
3	43 (28.7)
4 or more	22 (14.6)
Family history of cancer (149)
Yes	34 (22.8)
No	115 (77.2)
Laterality (200)
Right	109 (54.5)
Left	91 (45.5)
Tumor location (200)
Upper outer quadrant	103 (51.5)
Upper inner quadrant	36 (18)
Lower outer quadrant	19 (9.5)
Lower inner quadrant	7 (3.5)
Central	26 (13)
Multiple quadrants	8 (4)
Axillary tail	1 (0.5)
Stage (200)
I	11 (5.5)
II	136 (68)
III	43 (21.5)
IV	10 (5)
Surgical procedure (189)
MRM	121 (64)
BCS	68 (36)
Primary histology (200)
IDC	190 (95)
Metaplastic	6 (3)
Others	4 (2)
Grade (200)
II	27 (13.5)
III	173 (86.5)
Lymph node status (189)
Positive	86 (45.5)
Negative	103 (54.5)
Extracapsular extension (86)
Present	58 (67.4)
Absent	28 (32.6)
Lymphovascular invasion (194)
Present	81 (41.8)
Absent	113 (58.2)
Subtype (200)
Basal-like	101 (50.5)
Non-basal-like	99 (49.5)
Recurrence (200)
No	168 (84)
Local	2 (1)
Locoregional	1 (0.5)
Distant	29 (14.5)
Site of metastasis (29)
Lung	7 (24.2)
Liver	5 (17.2)
Brain	4 (13.8)
Others	13 (44.8)
Vital status (200)
Alive	161 (80.5)
Dead	39 (19.5)
Cause of death (39)
Disease-related	33 (84.6)
Non-disease-related	6 (15.4)

MRM, modified radical mastectomy; BCS, breast conservative surgery; IDC, infiltrating ductal carcinoma; SD, standard deviation.