The results indicated that, among aPL-positive patients, 16 had autoimmune thrombocytopenia (AIT), 20 had prolonged activated partial thromboplastin times, 11 had diverse diseases, 37 had systemic lupus erythematosus (SLE), and 19 had other connective tissue diseases. The gene discussed is FASLG; the disease is autoimmune thrombocytopenia.