CXCR4 and Miyoshi myopathy: There is some preliminary evidence from clinical studies that show high CXCR4 expression on PCs in MM correlate with a good prognosis [44] and we found that CXCR4 expression in primary CD24+ MM PCs from patient BM samples had a slight, yet significant increase in CXCR4 expression then CD24- PCs from the same patients (Figure 4C).