Table 1.

Histopathological characteristics and classification of breast tumor specimens (INCA, N = 154).

Histopathological characteristics	N		Tumor classifications	N
Histological type	154	%	TNM classification	154	%
ductal in situ	3	1.9	0	3	1.9
ductal invasive	135	87.7	I	28	18.2
lobular in situ	0	0.0	II	89	57.8
lobular invasive	7	4.5	III	34	22.1
mixed	2	1.3
other	7	4.5	Tumor subtypes	154	%
			luminal A	76	49.4
Tumor grade	154	%	luminal B	38	24.7
grade 1	10	6.5	luminala	5	3.2
grade 2	54	35.1	HER2 like	13	8.4
grade 3	89	57.8	triple negative	20	13.0
missing	1	0.6	Missing	2	1.3
Tumor size	154	%
pTis	3	1.9
pT1	48	31.2
pT2	100	64.9
pT3	3	1.9
pT4	0	0.0
Lymph node status	154	%
pN0	73	47.4
pN1	47	30.5
pN2	23	14.9
pN3	11	7.1
Estrogen receptor	154	%
negative	34	22.1
positive	119	77.3
missing	1	0.6
Progesterone receptor	154	%
negative	58	37.7
positive	95	61.7
missing	1	0.6
HER2	154	%
negative	113	73.4
positive	34	22.1
missing	7	4.5

^aluminal category refers to samples which were positive for both ER and PR but which HER2 status was not assessed.