Overall “Cluster 3” cell lines (red names, Figure 2) showed a good representation of gene signatures identified for “Apocrine”, G3.TN.Tumour” and high-grade breast carcinomas, while “Cluster 2” cell lines exhibited high similarities with the “Stroma”, “Mammosphere” and “CD24.CD44” expression patterns (orange names, Figure 2). The gene discussed is CD44; the disease is breast carcinoma.