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One hundred and two patients suffering from systemic lupus erythematosus were observed over 5-140 months. IgG and IgM anticardiolipin antibodies (aCL) were searched for by ELISA in 448 serum samples, and were found in 88 (86.3%) patients on at least one occasion. Changes of aCL levels and isotypes were recorded in most patients. In patients with medium (20-80 U. GPL and/or MPL) and high (> 80 U. GPL and/or MPL) aCL levels associations with thrombosis, neurological manifestations, cerebrovascular disease, prolonged aPTT, and thrombocytopenia were found. A highly significant statistical association was found between IgG aCL and the occurrence of active disease (p < 0.0001).
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Picillo et al. (1992) studied this question.
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