Additional laboratory studies revealed the ANA by IFA was positive in a titer of 1:640 in a homogeneous pattern and also revealed antineutrophil cytoplasmic antibodies (ANCA) elevated in a titer of 1:1,280 in a perinuclear pattern; all other lupus and vasculitis serologies were negative. Here, BTG3 is linked to systemic lupus erythematosus.