Although this bias cannot be ruled out, we compared the results with those of 35 patients with dystrophinopathy (26 with DMD, 6 with BMD, and 3 carriers), who showed BNP levels > 100 pg/mL at the NHO Osaka Toneyama Medical Center in 2019. The gene discussed is NPPB; the disease is neuromuscular disease caused by qualitative or quantitative defects of dystrophin.