FASLG and hyperplastic polyp: Transient aPL antibodies have been detected in many infectious diseases, including those caused by MP.[36] Witmer reported that MP, splenic infarct and transient aPL antibodies may have a new association between each other.[12] APL antibodies, like lupus anticoagulant or anticardiolipin antibodies, are a group of heterogeneous antibodies that direct against plasma proteins via binding to phospholipid surfaces.