Table 1.

Histopathological lesion characteristics

			% total	% subgroup
Malignant		295	62.8%
	Typing
	IDC	229		76.6%
	ILC	26		8.8%
	DCIS	22		7.5%
	Other	18		6.1%
	Immunohistochemical characteristics
	HR+, her2neu−	137		46.4%
	HR+, her2neu+	38		12.9%
	HR−, her2neu+	35		11.9%
	HR−, her2neu−	59		20.0%
	Missing/n.a.	26		8.9%
Benign		175	37.2%
	Fibroadenoma	41		23.4%
	Epithelial proliferations, adenosis	76		43.4%
	Papilloma	33		18.9%
	Phyllodes	2		1.1%
	Inflammation	12		6.9%
	Fibrosis, non-proliferative changes	11		6.3%

IDC invasive ductal cancer no specific type (NST), ILC invasive lobular cancer, DCIS ductal carcinoma in situ, other: invasive mucinous, invasive papillary cancer; malignant phyllodes, metastases; HR hormonal receptor; +, positive; −, negative