This guideline reviews the features of the Antiphospholipid syndrome [APS]- definition, clinical association, pathophysiology and the laboratory detection of Antiphospholipid antibodies. It includes a section on who should be tested for aPL antibodies and how this should influence their management. It also includes sections on the management of APS and the Catastrophic Antiphospholipid syndrome [CAPS].

Declaration of Interests

The BSH paid the expenses incurred during the writing of this guidance. None of the authors had conflicts of interest to declare. All authors have made a declaration of interests to the BSH and Task Force Chairs which may be viewed on request.