A case of catastrophic antiphospholipid syndrome presenting with acute respiratory distress syndrome as the initial manifestation.

Antiphospholipid syndrome (APS) is a systemic autoimmune disorder characterized by a combination of arterial or venous thrombosis and recurrent fetal loss, accompanied by elevated titers of antiphospholipid antibodies (aPL). Catastrophic antiphospholipid syndrome (CAPS) is a small subset of APS characterized by widespread systemic thrombotic disease with multiorgan failure. We herein describe an autopsy case of CAPS who developed severe respiratory failure due to acute respiratory distress syndrome (ARDS) as the initial manifestation.