Regarding laboratory analyses, myositis-specific antibodies were detected with similar frequencies in patients with concomitant SjD (PM-Scl-100 + SAE1 + PM-Scl75, PM-Scl100, SRP, MDA5 + SRP, Mi-2alpha + Mi2ß, each n=1) and those without coexisting SjD (SRP (n=2), NXP2 (n=1)). Here, UCN2 is linked to myositis disease.