Expression of markers for epithelial and mesenchymal lineages in tumor samples.

<p><b>A–E.</b> H+E staining of tumors formed in the mammary fat pad upon injection of bone marrow aspirated from the femurs of mice injected with tumorspheres isolated from samples 5–9 BM, respectively. <b>F–T.</b> Representative IHC demonstrating patterns of expression of E-cadherin (<b>F–J</b>), β-catenin (<b>K–O</b>), and fibronectin (<b>P–T</b>) in sample 5–9 BM tumors. 200× magnification in all panels.