Serum LIGHT levels in patients with DM-IP (RPIP/CIP) or DM and the HC, and changes in serum LIGHT levels before and 4 weeks after treatment.

<p>The serum LIGHT level was higher in the DM-IP patients than in the DM patients and was significantly higher than that in the HC (a). The serum LIGHT level in the DM-RPIP patients was significantly higher than that in DM-CIP patients (b). The serum LIGHT levels at 4 weeks after treatment initiation were significantly decreased compared with those before treatment (c). DM: dermatomyositis; IP: interstitial pneumonia; HC: healthy control subjects; RPIP: rapidly progressive IP; CIP; chronic IP; Before: before treatment; 4 weeks after: 4 weeks after treatment. Open circle: dead due to IP; Closed circle: alive.