Pattern of Breast Cancer Distribution in Ghana: A Survey to Enhance Early Detection, Diagnosis, and Treatment

Table 3

Relationship between breast cancer histology and onset of menstruation. Early menarche is an increased risk factor.

Menarche	Invasive ductal carcinoma	Invasive lobular carcinoma	In situ carcinoma	Benign masses
10–14	12	2	1	108
15	3	1	0	30
16–20	3	1	0	33
Totals	18	4	1	171