CD44 and breast neoplasm: Indeed, VEGF C expression was found to correlate with the CD44+/CD24-low + mammosphere (MS) signature (Pearson's r = 0.61) (Figure 1C) [31] and, importantly, also with gene sets that are upregulated in breast tumors after chemotherapy (Pearson's r = 0.51) (Figure 1C) [32].