MUC1 and clinically amyopathic dermatomyositis: We reported the cases of three patients with CADM-associated RPIPs treated with PMX-DHP in combination with conventional therapy, in whom the PaO2/FiO2 (P/F) ratio, serum lactate dehydrogenase (LDH) levels, Krebs von den Lungen-6 (KL-6) levels, and abnormal shadows on chest high-resolution computed tomography (HRCT) improved and all of whom survived [21].