Table 3.

Expression of E-cadherin and β-catenin in lobular carcinoma in situ (LCIS) and adjacent invasive areas

	LCIS		Invasive
Patient	E-cadherin	β-Catenin	E-cadherin	β-Catenin	Histology
1	+	+	+	+	ILC
2	ND	ND	+	+	IDC
3	–	–	–	–	IDC
4	–	ND	–	–	ILC
5	–	–	+	+	IDC
6	H	–	H	+	IDC
7	ND	ND	ND	ND	ILC
8	–	–	–	–	ILC
9	ND	–	–	–	ILC
10	ND	ND	H	ND	ILC
11	–	–	ND	ND	ILC
12	–	–	–	–	IDC
13	–	ND	H	+	IDC
14	ND	–	ND	–	IDC
15	H	–	+	–	IDC
16	–	–	–	–	ILC
17	–	–	H	H	IDC
18	–	–	–	–	ILC
19	–	–	–	–	ILC
20	–	–	–	–	ILC
21	–	–	–	–	ILC

Staining: +, membranous staining; –, no detectable membranous staining; H, limited membranous staining.

IDC, infiltrating ductal carcinoma; ILC, infiltrating lobular carcinoma; ND, not determined owing to lack of tissue availability.