Further antibody testing revealed positive antinuclear antibodies (ANA), anti-double-stranded DNA (anti-dsDNA), anti-Smith, and anti-U1-ribonucleoprotein (U1RNP), along with electrodiagnostic study supporting the diagnosis of SLE complicated by myositis and vasculitis. This evidence concerns the gene SNRNP70 and systemic lupus erythematosus.