Abnormally high level of C4b binding protein and deficiency of free fraction of protein S in a patient with systemic lupus erythematosus and recurrent thromboses.

Stankiewicz, A J; Steiner, M; Lally, E V; Kaplan, S R · J Rheumatol · 1991

case_report · Level V

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Abstract

A patient with systemic lupus erythematosus and numerous thrombotic accidents was found to have a deficiency of the free fraction of protein S, most likely due to an abnormally high level of C4b binding protein. These abnormalities, unique in comparison to 4 other patients with hypercoagulation states, were partially corrected with cyclophosphamide. There was no evidence of a consumption of complement components. The interactions between the hemostasis system and the complement cascade are discussed.

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