GAN and Miyoshi myopathy: ROC analysis further showed that the AUC of Ig G, Ig A, and TNF-α in predicting the MM at the first diagnosis were 0.772, 0.776, and 0.778, respectively, suggesting that the predictive value of TNF-α is higher than that of Ig G and Ig A, and the relationship between TNF-α and B cells has been confirmed in the literature.