Dermatomyositis (DM) is a subtype of idiopathic inflammatory myopathy characterized by skin rashes like heliotrope rash or Gottron sign, symmetric proximal limb muscle weakness, and the presence of myositis-specific antibodies including anti-MDA5, Anti-Mi2, antiNXP2, anti-TIF1, among others. This evidence concerns the gene IFIH1 and dermatomyositis.