TNFSF13B and dermatomyositis: The same study also indicates that the BAFF level of anti-MDA5 DM patients aggravated by ILD was significantly higher than anti-MDA5 DM patients not suffering from ILD, and the level of BAFF was parallel with KL-6, an indicator of the severity of ILD, suggesting that patients with anti-MDA5 DM complicated with severe ILD tend to have higher levels of serum BAFF (52); Thirdly, a recent study by Shuang Ye et al.