What laboratory tests can support the diagnosis of the antiphospholipid syndrome?

What laboratory tests can support the diagnosis of the antiphospholipid syndrome?

Patients with the antiphospholipid syndrome can have a variety of antibodies to molecules called phospholipids in their blood. These antibodies include VDRL/RPR (a syphilis test that can be falsely positive in these patients), lupus anticoagulant, prolonged PTT, and cardiolipin antibody. As mentioned above, the anticardiolipin antibody has also been found in patients with the immune disease, systemic lupus erythematosus, which is characterized by the production of a variety of abnormal antibodies.

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