From: A catastrophic seronegative anti-phospholipid syndrome: case and literature review
1. Evidence of involvement of three or more organs, systems and/or tissuesa | |
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2. Development of manifestations simultaneously or in less than a week. | |
3. Confirmation by histopathology of small vessel occlusion in at least one organ or tissueb | |
4. Laboratory confirmation of the presence of antiphospholipid antibodies (lupus anticoagulant and/or anticardiolipin antibodies)c | |
Definite catastrophic APS: All 4 criteria. | |
Probable catastrophic APS: | |
– All 4 criteria, except for only two organs, systems and/or tissues involvement. | |
– All 4 criteria, except for the absence of laboratory confirmation at least 6 weeks apart due to the early death of a patient never tested for aPL before the catastrophic APS. | |
– Criteria 1, 2 and 4. | |
– Criteria 1, 3 and 4 and the development of a third event in more than a week but less than a month, despite anticoagulation. |