Definition Antiphospholipid syndrome describes an acquired autoimmune disorder characterized by venous and/or arterial thromboses as well as recurrent pregnancy loss. This syndrome may occur secondarily to autoimmune disorders such as systemic lupus erythematosus or rheumatoid arthritis, or it may occur in isolation. Characteristically, antiphospholipid syndrome results in mild prolongation of the aPTT and positive testing for […]