Using two different house-keeping genes (ACTB and ABL1) as normalizer [20, 21] we found that although the expression level of DEK was similar between the control BM (n = 8) and patient samples with stage-I (n = 1) and stage-II (n = 7) MM (Fig 1A and 1B), there was no detectable DEK mRNA expression in 10 out of 21 patients with stage-III MM (Table 1). This evidence concerns the gene DEK and Miyoshi myopathy.