title: Histopathologic and immunofluorescence study of skin lesions associated with circulating lupus anticoagulant.
abstract: We reviewed the histopathologic findings in 28 specimens from 25 patients who had skin lesions associated with lupus anticoagulant. The clinical lesions were ulcers, gangrene, thrombophlebitis, hemorrhage, and cutaneous necrosis. Noninflammatory thrombosis of small dermal vessels was observed in all 8 biopsy specimens from gangrene lesions, 10 of 13 specimens from ulcer lesions, and 2 of 5 specimens from thrombophlebitis lesions. Necrotizing vasculitis was not significant in these biopsy specimens. Immunofluorescence findings included a positive lupus band test in lupus erythematosus-associated disease and nonspecific deposits in occasional cases. Focal noninflammatory intravascular coagulation is responsible for the microscopic and clinical skin lesions in these patients.
mesh_terms: D001779:Blood Coagulation Factors / Q000032:analysis / Q000276:immunology*; D003176:Complement C3 / Q000032:analysis; D005340:Fibrinogen / Q000032:analysis; D005455:Fluorescent Antibody Technique; D005734:Gangrene; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D016682:Lupus Coagulation Inhibitor; D008180:Lupus Erythematosus, Systemic / Q000097:blood / Q000473:pathology*; D012867:Skin / Q000098:blood supply / Q000473:pathology*; D012883:Skin Ulcer / Q000473:pathology; D013924:Thrombophlebitis / Q000473:pathology; D013927:Thrombosis / Q000473:pathology
chemical_list: D001779:Blood Coagulation Factors; D003176:Complement C3; D007075:Immunoglobulin M; D016682:Lupus Coagulation Inhibitor; D005340:Fibrinogen