All are included in sydney revision of sapporo criteria for Antiphospholipid antibody syndrome:
Livedo reticularis is not included in the diagnostic criteria for Antiphospholipid antibody syndrome. Ref: Harrisons principles of internal medicine, 18th edition: Page 2737
Vascular thrombosis
Livedo reticularis
3 or more unexplained spontaneous aboions
Lupus anticoagulant in plasma