Serum concentrations of hepcidin-25 did not differ between MM patients and control subjects: 28.8 (16.5; 44.6) versus 27.1 (20.0; 37.3) ng/mL; p = 0.9); however, anemic MM patients (54.2 (30.9; 90.2)) had significantly higher hepcidin-25 than controls (p = 0.006). This evidence concerns the gene HAMP and Miyoshi myopathy.