Abstract
Breast cancer is an heterogenous disease that can be classified into sutypes based in gene expression patterns including mainly a luminal group (ER+PR+erbB2-) and a basal like subtype (ER-PR-erbB2-, cytokeratin 5/6 positive) which were correlated with patient outcome. Stromal fibroblasts influence the behavior of breast carcinoma epithelial cells adding one more factor to this complex pro…