Immunohistochemical Features of Breast Cancer Seen in Women in Kinshasa, Democratic Republic of the Congo: A Six-Year Retrospective Study

Table 1

Age, pathological, and immunohistochemical characteristics of breast cancer.

Variable	Number ()	Percentage
Age
<40 years	37	19.47
40-49 years	74	38.95
≥50 years	79	41.58
Elston and Ellis histoprognostic grade
I	130	68.42
II	54	28.42
III	6	3.16
Histological subtype
Ductal	179	94.21
Mucinous	5	2.63
Lobular	4	2.11
Apocrine	1	0.53
Papillary	1	0.53
Estrogen receptors
Negative	28	14.74
Positive	162	85.26
Progesterone receptors
Negative	43	22.63
Positive	147	77.37
HER2
Negative	139	73.16
Positive	51	26.84
Ki-67
≤14%	98	51.58
>14%	92	48.42