Invasive Lobular Carcinoma of the Breast with Extracellular Mucin: Case Report of a New Variant of Lobular Carcinoma of the Breast

Figure 3

Immunohistochemical stain showed absence of membranous E-cadherin staining in the classical invasive lobular carcinoma and in the cells surrounded by extracellular mucin (a: E-cadherin ×20) with positive internal control (b: E-cadherin ×40). The tumor cells were positive for ER (c: ER ×20) and negative for PR and HER2 (images not shown).

(a)

(b)

(c)