The average percentage of plasma cell bone marrow infiltration was 2.8, 18.1, and 37.9% for MGUS, SMM, and MM, respectively, and the average amount of serum myeloma protein (M-protein) was 5.5 g/L for MGUS, 17.1 g/L for SMM, and 26.9 g/L for MM. Here, MYOM2 is linked to Miyoshi myopathy.