Whereas the median PFS of the c-maf-negative MM patients was 16.8 months (95% CI 13.3–20.3), that of the c-maf-positive MM patients was 14.5 months (95% CI 11.8–17.2); and no significant difference was found between the two groups of patients (p = 0.658). The gene discussed is MAF; the disease is Miyoshi myopathy.