MM transcriptomes published by de Jong et al. (2021) [11], were enriched in pericentromeric tandem repeats transcripts of the HS3 family, especially in the pooled fraction of CD45+/CD38− cells and cells of non-hematopoietic origin (Figure 5a, ERS459790_1 and_2) and in the fraction of cells of non-hematopoietic origin that included endothelial cells and mesenchymal stromal cells gated by CD271, CD105, CD31, and CD34 (Figure 5a, ERS4597776_1 and 2). The gene discussed is PECAM1; the disease is Miyoshi myopathy.