CD4+FOXP3+ T cells at the time of engraftment were increased in patients with the relapse or progression of MM during 12 months following auto-HSCT (n=10) compared to non-relapsed patients (n=50): 6.7% (5.3—8.9%) vs 4.9% (2.8—6.6%); PU = 0.026. Here, FOXP3 is linked to Miyoshi myopathy.