CD79A and Miyoshi myopathy: Peak3 showed the best diagnostic power to differentiate LCMM from IgG MM patients (AUC = 0.899) with the optimum cut-off value as 6.855 (sensitivity 100.0%, specificity 76.2%, accuracy 88.1%), while Peak7 showed the greatest AUC to distinguish LCMM from IgA MM patients (AUC = 0.922) with the optimum cut-off value as 4.220 (sensitivity 92.9%, specificity 82.9%, accuracy 88.0%) (Fig 3D and 3E, Table 4).