Laboratory results showed elevated cardiac troponin at 16.3 μg/L, thrombocytopenia with a platelet count of 76 × 103/mm3, no schizocytes, elevated C-reactive protein of 94 mg/L, prothrombin time within the therapeutic range (INR: 4.35), microscopic hematuria without renal failure, and high aPL titers (aCL IgG: 76.7 GPL, IgM: 17.4 MPL, aβ2GPI IgG: 83.2 SGU, and IgM: 30.8 SMU). Here, CD40LG is linked to acute kidney injury.