Table 2.

Distribution of tumor stage, histological subtypes, and centricity

	Absolute frequencies, n	Cumulative frequencies, %
cT
la	0	0
lb	7	5.0
1c	49	35.3
2	56	40.3
3	10	7.2
4	10	7.2
4a	0	0
4b	2	1.4
4d	3	2.2
X	2	1.4
cN
0	77	55.4
l	39	28.1
2	20	14.4
3	2	1.4
3c	1	0.7
M
0	139	100
Histology
Basaloid subtype	1	0.7
Medullary characteristics	2	1.4
Metaplastic	1	0.7
Mucinous	1	0.7
NST	126	90.6
NST, inflammatory	7	5.0
Plate epithelium differentiation	1	0.7
Subtype
Luminal A ER+, PR+, Her2neu neg, Ki67 ≤15%	6	4.3
Luminal B ER+, PR+, Her2neu neg, Ki67 >15%	45	32.4
HER2 like ER ±, PR ±, Her2neu pos	47	33.8
Triple negative	41	29.5
Multiple tumor masses (multifocal, multicentricity, bilateral)
All patients	19	13.7
Non-study group	12	13.3
Study group	7	14.3