Laboratory tests showed positive antinuclear antibody (ANA) test, positive anti-double-stranded DNA (DS-DNA) test, positive anti-ribosomal protein P (RIB), and complement C4 (7.4 mg/dL); she was diagnosed as having SLE and started on prednisone 5 mg twice a day as the main treatment. Here, C4A is linked to systemic lupus erythematosus.