[Aquired inhibitors of coagulation in a patient with systemic lupus erythematosus and antiphospholipid antibodies: response to rituximab].

Hematologic signs of systemic lupus erythematosus are diverse (SLE). Although a delayed coagulation time is anti-phospholipid antibody related, thrombotic events are the usual clinical manifestation. Spontaneous appearance of circulating anticoagulant in the absence of a previous coagulation disorder is secondary to the development of antibodies to factors II, V, VIII, IX, XI, XII,vonWillebrand, and other membrane glucoproteins, all of them uncommon causes (1 case per million persons per year) of life threatening coagulopathies. We report a case of SLE and antiphospholipid antibodies in a woman with a hemorrhagic syndrome, probably caused by multiple antibodies to coagulation factors, unresponsive to steroids and high-dose immunosupressive therapy and a favorable response to rituximab.