Antiphospholipid antibodies in IgA vasculitis children: At the time of admission, the aPL antibodies were present in 15 (31.2%) patients, of which 9 (18.8%) patients were Lupus anticoagulant (LAC) positive, 4 (8.3%) patients had aCL-IgM, 3 (6.3%) patients had anti-beta-2 glycoprotein IgM, and 2 patients had aCL-IgG. This evidence concerns the gene CD40LG and systemic lupus erythematosus.