Furthermore, after dividing the patients with DM by MSAs, significantly higher serum levels of Gal-9 were observed in the anti-MDA5-positive group than in the anti-MDA5-negative group [33.8 (21.9–44.7) vs. 16.2 (10.0–26.9) ng/mL, p < 0.001] (Figure 1B). Here, LGALS9 is linked to dermatomyositis.