Figure 1. Ring1B expression in invasive ductal breast carcinoma.

A. Staining for Ring1B is weak in cells of adjacent normal human mammary ducts (picture on the left), medium in invasive ductal carcinoma cells (middle) and strong in carcinoma cells invading mammary fat (right) within the same tumor tissue. Sections were counterstained with Hematoxylin. B. Immunohistochemistry analysis of Ring1B, S100A4 and Bmi1 expression in serial sections of two different invasive ductal breast carcinoma samples. Bars, 100 μm.