Antiphospholipid syndrome (APS) is defined by the association of vascular thrombosis potentially affecting all segments of the vascular bed, complications during pregnancy (including unexplained consecutive spontaneous abortions, premature births because of severe preeclampsia, eclampsia or placental insufficiency or unexplained death before the 10th week of gestation), and the presence of antiphospholipid antibodies (aPL), namely anticardiolipin antibodies (aCL) and lupus anticoagulant (LAC) [115]. Here, LCT is linked to autoimmune polyendocrinopathy.