To further validate the MUC20 expression profile in patients with MM, we collected CD138 + bone marrow plasma cells from HDs (n = 17) and patients with NDMM (n = 53), tMM receiving initial therapy with BTZ (n = 52), and RRMM receiving BTZ treatment (n = 40) who were admitted to our hospital. The gene discussed is SDC1; the disease is Miyoshi myopathy.