On the other hand, PDSs generated from breast cancers with associated lymph nodes (LN) metastasis were characterized by higher expressions of the EMT marker FOSL1 (p = 0.047) and the breast CSC-related gene ALDH1A3 (p = 0.024), when MCF7 or T-47D cell lines were used as reporters, respectively (Figure 3K,L). This evidence concerns the gene FOSL1 and breast cancer.