To assess the expression of DSG2 in MM PC, we analysed data from two publicly available DNA microarray datasets: E‐GEOD‐16122 [19] and E‐MTAB‐363 [20] that measured gene expression within CD138+ BM PC from newly diagnosed MM patients and compared these with PC from normal BM or MGUS patients. Here, SDC1 is linked to Miyoshi myopathy.