Second, we performed unsupervised hierarchical clustering of the Finak et al. 39 stroma-derived prognostic predictor (SDPP) genes and WNT7A in The Cancer Genome Atlas (TCGA) primary breast cancer data set and demonstrated that WNT7A clusters with the SDPP poor prognostic genes (Fig. 8e). This evidence concerns the gene WNT7A and breast cancer.