[Acquired haemophilia in a patient with systemic lupus erythematosus].

INTRODUCTION: In patients with lupus, the most common acquired circulating anticoagulant is antiprothrombinase which is responsible for thrombosis. The presence of antibodies directed against factor VIII is rarely found in systemic lupus erythematosus. A case of acquired haemophilia in a patient with lupus is reported. CASE REPORT: A 30 year-old woman with systemic lupus erythematosus developed a right coxalgia and ecchymotic skin lesions which were prominent on the right arm and forearm. Laboratory values were as follows: positive antinuclear antibodies > 1: 2 560, anti-DNA antibodies (300 IU/ml), prolonged activated partial thromboplastin time, reduced factor VIII activity (1 p. 100) and the presence of antibodies against factor VIII. Magnetic nuclear resonance of the right hip confirmed the presence of an intramuscular hematoma. The patient was initially treated with intravenous pulse and oral corticosteroids, intravenous immunoglobulins and intravenous cyclophosphamide. Clinical and biological improvement was promptly obtained. DISCUSSION: In our patient with systemic lupus erythematosus, bleeding revealed acquired haemophilia with antibodies against factor VIII. It should be pointed out that the association between lupus and haemophilia is uncommon and that at present no standardized treatment can be recommended.