CD40LG and Arterial thrombosis: On the other hand, Kraiem et al reported that some antiphospholipid antibodies were positive in 54.2% of 48 CD patients.30 Sipeki et al reported that of 264 CD patients, aPS/PT was positive in 20.4% (any 1 of IgG, IgM, or IgA)31 and that 14.6% of the CD patients without events of thrombosis had positive aPS/PT, whereas 50.0%, 36.4%, or 40.0% of the CD patients with events of arterial thrombosis, venous thrombosis, or pregnancy loss had positive aPS/PT, respectively.