Assessment of breast cancer immunohistochemistry and tumor characteristics in Nigeria

Table 1 Clinico-pathological and molecular characteristics of the breast cancer patients (259)

Histologic type	Frequency	Percentage
Invasive ductal carcinoma	258	99.6
Invasive lobular carcinoma	1	0.4
Grading
I	62	23.9
II	131	50.6
III	66	25.5
Tumour size
< 2.0 cm	62	23.9
2-5 cm	131	50.6
> 5.0 cm	66	25.5
Lymph node involvement
No	22	8.5
1-3	196	75.7
≥ 4	41	15.8
Hormonal receptors
ER + ve	113	43.6
ER - ve	52	20.1
PR + ve	42	16.2
PR - ve	12	4.6
HER/2 neu + ve	23	8.9
HER/2 neu - ve	17	6.6
Total	259	100

ER: Estrogen receptor; PR: Progesterone receptor; Human epidermal growth factor receptor-2.